In the arrangement shown in the figure there are two coils wound on a non-conducting cylindrical rod. (c) The difference between the direct and alternating currents is that the current always flows in one direction, whereas the alternating current reverses its direction periodically. The compass needle should be placed on a piece of paper near the magnet. Feedforward Control with Dynamic Compensation, 4-20mA Junction Box versus Fieldbus (FF) Junction Box, What is a Feedback Control System? The section contains multiple choice questions and answers on laws like-biot savart, faraday, lenz, ampere and maxwell laws. The seating surface is placed at a slight angle to permit easier opening at lower pressures, more positive sealing, and less shock when closing under higher pressures. (b) minimum in the middle 6. Question 12. Magnetic flux is the total number of magnetic field lines passing through a particular area. Answer: (d) there are momentary galvanometer deflections that die out shortly; the deflection are in opposite directions. (c) the pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet Magnetic field lines are the lines in a magnetic field whose tangent indicates the field direction at any given position and whose density gives the field magnitude. Magnetic field lines form a closed-loop. Digital Image Processing MCQ (Multiple Choice Questions) with dip tutorial, introduction, analog image vs digital image, signal, system, keywords, origin of camera, photography, etc. Question 7. Magnetic field lines around a straight conductor forms a pattern of The site owner may have set restrictions that prevent you from accessing the site. Then the key is inserted and later removed. The magnetic field is a field produced by the magnet or electric charges in motion. NCERT Solutions for Class 10 Science Chapter 13 CBSE Free PDF Download. They denote the direction of the magnetic field. Question 8. This type of check valve usually has replaceable seat rings. We are not permitting internet traffic to Byjus website from countries within European Union at this time. Connect, collaborate and discover scientific publications, jobs and conferences. (c) chemical energy to mechanical energy We have Provided Magnetic Effects of Electric Current Class 10 Science MCQs Questions with Answers to help students understand the concept very well. Casino Royale The Lord of the Rings: The Fellowship of the Ring The Lord of the Rings: The Return of the King The Lord of the Rings: The Two Towers Quantum of Solace Skyfall Die Another Day Star Wars: Episode IV - A New Hope Harry Potter and the Sorcerer's Stone Harry Potter and the Prisoner of Azkaban Dr. No From Russia with Love Thunderball Jurassic Park These valves are fully closed when the flow reaches zero and prevent back flow. Magnetic field lines never intersect with each other. Electric flux refers to the number of electric field lines passing through a closed surface. A computer network is a set of computers sharing resources located on or provided by network nodes.The computers use common communication protocols over digital interconnections to communicate with each other. Inside the magnet, the direction of the magnetic field lines is from the south pole to the north pole. MCQs in all electrical engineering subjects including analog and digital communications, control systems, power electronics, electric circuits, electric machines Magnetic field lines form a closed-loop. Magnetic field can be depicted in several ways. (a) more at the ends than at the centre Assertion : On bringing a positively charged rod near the uncharged conductor, the conductor gets attracted towards the rod. By convention the magnetic field lines emerge from pole and merge at pole. (a) concentric circles Reason : The electric field lines of the charged rod are perpendicular to the surface of conductor. (a) E 1 > E 2 (b) E 1 < E 2 (c) E 2 = rE 1 (d) E 2 = E 1 /r. The section contains questions and answers on cartesian, cylindrical and spherical Coordinate System. Some important properties of magnetic field lines are listed below . In the manufacturing industry, there will be a need for reprogramming due to the change in the nature of production. (d) found to increase from one end to the other. (d) The relative strength of the magnetic field is shown by degree of closness of the field lines. Question 3. (b) there is a momentary deflection in the galvanometer but it dies out shortly and there is no effect when the keys is removed. Magnetic Effects of Electric Current Class 10 MCQs Questions with Answers. Answer: (c) if magnetic field lines are parallel and equidistant, they represent zero field strength. (b) B 2. The figure here shows electric field lines. Magnetic field lines never intersect with each other. You can also download the PDF of Electromagnetic Theory MCQs by applying below. Right hand thumb rule In previous fault calculation, Z 1, Z 2 and Z 0 are positive, negative and zero sequence impedance respectively. Full membership to the IDM is for researchers who are fully committed to conducting their research in the IDM, preferably accommodated in the IDM complex, for 5-year terms, which are renewable. (a) 240 V (a) the deflection in the galvanometer remains zero throughout. Then As there is a change in resistance of strain gauge, the bridge gets unbalanced and producing an indication at the voltmeter. All for free. (c) use of stabilizers electric field-intensity, density, potential and electrostatic energy and proprties. A coil of many circular turns of insulated copper wire wrapped closely in shape of a cylinder is called a . Therefore, magnetic field lines are represented by a vector. 6. Answer: (b) electrical energy to mechanical energy. The fact that they intersected at a whole number is purely coincidental. The strength of magnetic field inside a long current carrying straight solenoid is (c) Field lines can cross each other The tangent drawn to the magnetic field lines gives the direction of the magnetic field. Answer: (c) straight lines parallel to each other (Due to earths magnetic field). Solenoid Valve with Manual Reset Working Principle, What is an Actuator? Magnetic field lines appear to emerge or start from the north pole and merge or terminate at the south pole. The section contains questions and answers on conductors, dielectrics and its strengths, polarization and boundary conditions. An electric motor is rotating device that converts energy to energy. Consider two points A and B. F is a force. The magnetic field lines point from B to A. You can unsubscribe at any time. Now diagnosing the problem becomes much easier with the help of the invention of X-Ray, Ultrasonography, ECG, MRI, Penicillin, etc. The formulas for converting between degree Celsius and degree Fahrenheit are: To find the temperature when both are equal, we use an old algebra trick and just set F = C and solve one of the equations. Answer: (d) In India, the AC changes direction after every \(\frac{1}{50}\) second. Simple Conversions ofCelsius and Fahrenheit Temperature Scales, F to C : Deduct 32, then multiply by 5, then divide by 9, C to F : Multiply by 9, then divide by 5, then add 32, C to F :Add 40, multiply by 9/5, then subtract 40, F to C : Add 40, multiply by 5/9, then subtract 40. Intrinsic Impedance and Propagation Constant, Advanced Electromagnetic Theory Questions, Instrumentation Engineering MCQ PDF Download, 1000 Data Structures & Algorithms II MCQs, 50k Electronics & Communication Engg MCQs. (d) In India, the AC changes direction after every \(\frac{1}{50}\) second. Another way is the use of field lines. (c) at a point located in the plane of the paper, on the north side of the wire (d) 220 V. 1. Web 5. NCERT Solutions Class 12 Business Studies, NCERT Solutions Class 12 Accountancy Part 1, NCERT Solutions Class 12 Accountancy Part 2, NCERT Solutions Class 11 Business Studies, NCERT Solutions for Class 10 Social Science, NCERT Solutions for Class 10 Maths Chapter 1, NCERT Solutions for Class 10 Maths Chapter 2, NCERT Solutions for Class 10 Maths Chapter 3, NCERT Solutions for Class 10 Maths Chapter 4, NCERT Solutions for Class 10 Maths Chapter 5, NCERT Solutions for Class 10 Maths Chapter 6, NCERT Solutions for Class 10 Maths Chapter 7, NCERT Solutions for Class 10 Maths Chapter 8, NCERT Solutions for Class 10 Maths Chapter 9, NCERT Solutions for Class 10 Maths Chapter 10, NCERT Solutions for Class 10 Maths Chapter 11, NCERT Solutions for Class 10 Maths Chapter 12, NCERT Solutions for Class 10 Maths Chapter 13, NCERT Solutions for Class 10 Maths Chapter 14, NCERT Solutions for Class 10 Maths Chapter 15, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, NCERT Solutions for Class 10 Science Chapter 3, NCERT Solutions for Class 10 Science Chapter 4, NCERT Solutions for Class 10 Science Chapter 5, NCERT Solutions for Class 10 Science Chapter 6, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16, NCERT Solutions For Class 9 Social Science, NCERT Solutions For Class 9 Maths Chapter 1, NCERT Solutions For Class 9 Maths Chapter 2, NCERT Solutions For Class 9 Maths Chapter 3, NCERT Solutions For Class 9 Maths Chapter 4, NCERT Solutions For Class 9 Maths Chapter 5, NCERT Solutions For Class 9 Maths Chapter 6, NCERT Solutions For Class 9 Maths Chapter 7, NCERT Solutions For Class 9 Maths Chapter 8, NCERT Solutions For Class 9 Maths Chapter 9, NCERT Solutions For Class 9 Maths Chapter 10, NCERT Solutions For Class 9 Maths Chapter 11, NCERT Solutions For Class 9 Maths Chapter 12, NCERT Solutions For Class 9 Maths Chapter 13, NCERT Solutions For Class 9 Maths Chapter 14, NCERT Solutions For Class 9 Maths Chapter 15, NCERT Solutions for Class 9 Science Chapter 1, NCERT Solutions for Class 9 Science Chapter 2, NCERT Solutions for Class 9 Science Chapter 3, NCERT Solutions for Class 9 Science Chapter 4, NCERT Solutions for Class 9 Science Chapter 5, NCERT Solutions for Class 9 Science Chapter 6, NCERT Solutions for Class 9 Science Chapter 7, NCERT Solutions for Class 9 Science Chapter 8, NCERT Solutions for Class 9 Science Chapter 9, NCERT Solutions for Class 9 Science Chapter 10, NCERT Solutions for Class 9 Science Chapter 11, NCERT Solutions for Class 9 Science Chapter 12, NCERT Solutions for Class 9 Science Chapter 13, NCERT Solutions for Class 9 Science Chapter 14, NCERT Solutions for Class 9 Science Chapter 15, NCERT Solutions for Class 8 Social Science, NCERT Solutions for Class 7 Social Science, NCERT Solutions For Class 6 Social Science, CBSE Previous Year Question Papers Class 10, CBSE Previous Year Question Papers Class 12, JEE Advanced Previous Year Question Papers, JEE Main Chapter-wise Questions and Solutions, JEE Advanced Chapter-wise Questions and Solutions, JEE Main 2022 Question Papers with Answers, JEE Advanced 2022 Question Paper with Answers. Straight body swing check valves contain a disk that is hinged at the top. The section contains MCQs on maxwell law 1, 2, 3, 4 and also maxwell law in time static fields as well as time varying fields. In India the potential difference between live wire and neutral wire is Let us describe this using equations. Question 1. (b) No two field lines can cross each other (c) green Faradays law states that a current will be induced in a conductor which is exposed to a changing magnetic field. The pressure of the fluid passing through the system opens the valve, while any reversal of flow will close the valve. Butterfly Valves Construction, Types, Stem & Bonnet Assembly, What is a Feedback Control System? Answer: (a) E 1 > E 2 Full membership to the IDM is for researchers who are fully committed to conducting their research in the IDM, preferably accommodated in the IDM complex, for 5-year terms, which are renewable. In the manufacturing industry, there will be a need for reprogramming due to the change in the nature of production. (a) directly above the wire Check the below NCERT MCQ Questions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current with Answers Pdf free download. The corona effect will occur in high voltage systems unless sufficient care is taken to limit the strength of the surrounding electric field. Magnetic field lines indicate the magnetic fields direction. Magnetic field in a solenoid formula is given as B = 0 nl. The direction of magnetic field at a point will be North to South In static and balanced power system In this circuit, R 1 and R 3 are the ratio arms equal to each other, and R 2 is the rheostat arm has a value equal to the strain gage resistance. (a) earthing Corona discharge can cause an audible hissing or cracking noise as it ionizes the air around the conductors. Alternating current Each paper writer passes a series of grammar and vocabulary tests before joining our team. All Rights Reserved. The general types of check valves are swing, tilting-disk, piston, butterfly, and stop. A PLC can be programmed according to the operational requirement of the process. The electric field strength at P 1 is E 1 and that at P 2 is E 2 If distance between P 1, P 2 is r, then which of the following statement is true? Mathematically, it can be represented as a vector field which can be plotted as different sets on a grid. Magnetic field and field lines: The influence of force surrounding a magnet is called magnetic field. The photodiode is a p-n junction semiconductor device that transmutes the light into an electric current. Q.20. The MCQ Test offered by Embibe is curated based on revised CBSE Class Books, paper patterns and syllabus for the year 2021. (b) the strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron, when placed inside the coil (c) 280 V (c) straight line A circular loop placed in a plane perpendicular to the plane of paper carries a current when the keys is ON. The set of vectors are connected with lines. (b) use of fuse When the gauge is unstrained, the bridge is balanced, and voltmeter shows zero value. (a) Flemings right hand rule Move the compass needle to different positions and mark the directions. 10 Lines on Essay on Wonders of Science in English. The section contains MCQs on gradient, curl, line, surface and volume integrals, theorems like-stokes, greens, gauss divergence. The pressure of the fluid passing through the system opens the valve, while any reversal of flow will close the valve. The impedance offered by the system to the flow of zero sequence current is known as zero sequence impedance. AC generator converts energy into energy. Q is the charge. To understand armature windings in a DC generator, we first need to understand pole pitch, coils, and coil span.. What is Pole Pitch? Check valves are designed to prevent the reversal of flow in a piping system. The section contains multiple choice questions and answers on dot and cross product, vector-position, properties and distance. Click Start Quiz to begin! Inside the magnet, the direction of the magnetic field lines is from the south pole to the north pole. Across: Be the first to get exclusive content straight to your email. Question 15. Choose the incorrect statements from the The device which convert electrical energy into mechanical energy Closure is accomplished by the weight of the check mechanism, by back pressure, by a spring, or by a combination of these means. You can unsubscribe at any time. For a current in a long straight solenoid, N- and S-poles are created at the two ends. The insulation colour of earth wire is The difference between the direct current and alternating current is that the direct current flows in direction, whereas the alternating current its direction periodically. An electric field is also described as the electric force per unit charge. (b) magnetic field lines are closed curves Electric flux is defined as the total number of lines of force emanated from a charged object. Concentric circles (d) relative strength of magnetic field is shown by the degree of closeness of the field lines. 2011-2022 Sanfoundry. Seating is either metal-to-metal or metal seat to composition disk. Wish you the best in your endeavor to learn and master Electromagnetic Theory! The current as seen from points A and B (in the plane of paper and on the axis of the coil) is anticlockwise and clockwise respectively. Magnetic field in a long solenoid is homogeneous and its strength doesnt depend (b) The right-hand thumb rule is used to find the direction of magnetic fields due to current carrying conductors. Choose the incorrect statements from the following regarding magnetic lines of field. Choose the incorrect statement C = (C * 9/5) + 32C (C * 9/5) = 32-4/5 * C = 32C = -32 * 5/4C = -40, F = (F * 9/5) + 32F (F * 9/5) = 32-4/5 * F = 32F = -32 * 5/4F = -40. Closure is accomplished by the weight of the check mechanism, by back pressure, by a spring, or by a combination of these means. () Magnetic field lines are closed curves 7. Question 10. Electrical Engineering MCQs Need help preparing for your exams? If the key in the arrangement figure given below is taken out (the circuit is made open) and magnetic . We have over 5000 electrical and electronics engineering multiple choice questions (MCQs) and answers with hints for each question. So the temperature when both the Celsius and Fahrenheit scales are the same is -40 degrees. You can refer to NCERT Solutions forClass 10 Science Chapter 13 Magnetic Effects of Electric Current to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. Both the Celsius to Fahrenheit and Fahrenheit to Celsius equations are linear (no quadratic terms) implying they are straight lines. Question 1. Field lines have both direction and magnitude at any point on the field. (a) Flemings right-hand rule is a simple rule to know the direction of induced current. The magnetic field is stronger at the poles because the field lines are denser near the poles. Answer. So the temperature when both the Celsius and Fahrenheit scales are the same is -40 degrees. Electricity and electric and electronic equipment plays a vital role in our everyday life. (a) the field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid Reason : Both the Celsius to Fahrenheit and Fahrenheit to Celsius equations are linear (no quadratic terms) implying they are straight lines. The section contains questions and answers on magnetic force, torque, dipole, materials, energy, circuits and boundary conditions. (b) 250 V Start practicing now for exams, online tests, quizzes, and interviews! These valves are activated by the flowing material in the pipeline. 5. No tracking or performance measurement cookies were served with this page. Access NCERT Solutions for Class 7 Science Chapter 14 Electric Current and Its Effects. Question 13. 4. You should practice these MCQs for 1 hour daily for 2-3 months. The closeness or density of the field lines is directly proportional to the strength of the field. Colour of insulation of live wire, Answer: Here the magnetic field lines never cross each other and never stop. Both of these generators produce electrical power based on the principle of Faradays law of electromagnetic induction.. RD Sharma Solutions , RS Aggarwal Solutions and NCERT Solutions. (b) electrical energy to mechanical energy The N-pole of the resultant magnet is on the faces close to magnetic field in intensity as well as density and also magnostatic energy and its properties. Where, E is the electric field. According to new CBSE Exam Pattern, MCQ Questions for Class 10 Science pdf Carries 20 Marks. ON OFF Valve Preventive Maintenance and Testing Procedure, Control Valve Accessories Principle, Purpose, Advantages. Types & Advantages, Zero Suppression and Zero Elevation Calculations, Electric Circuits Objective Questions Set 10. Magnetic field lines do not cross one another. (d) mechanical energy to light energy. Why Restriction Orifice is some distance from Blowdown valve ? Be the first to get exclusive content straight to your email. Question 5. 2022 Reproduction without explicit permission is prohibited. The most important safety method used for protecting home appliances from short circuiting or overloading is by These interconnections are made up of telecommunication network technologies, based on physically wired, optical, and wireless radio-frequency methods that field lines are drawn over the horizontal plane ABCD, the lines are This way of systematic learning will prepare you easily for Electromagnetic Theory exams, contests, online tests, quizzes, MCQ-tests, viva-voce, interviews, and certifications. Swing check valves are available in either Y-pattern or straight body design.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'instrumentationtools_com-box-4','ezslot_15',165,'0','0'])};__ez_fad_position('div-gpt-ad-instrumentationtools_com-box-4-0'); A straight check valve is illustrated in Figure. -. (c) same at all points Therefore, magnetic field lines are vectors. (c) straight lines parallel to each other (Due to earths magnetic field) Magnetic field around a straight conductor (c) A if the current is small, and B if the current is large (b) Flemings left hand rule Question 14. 4. At any point on the field, field lines have both direction and magnitude. PLCs play a crucial role in the field of automation, using forming part of a larger SCADA system. Answer: (c) Field lines can cross each other. They are recommended for lines having low velocity flow and should not be used on lines with pulsating flow when the continual flapping or pounding would be destructive to the seating elements. This condition can be partially corrected by using an external lever and weight. (c) if magnetic field lines are parallel and equidistant, they represent zero field strength Lenzs law of electromagnetic induction states that the direction of this induced current will be such that the magnetic field created by the induced current opposes the initial changing magnetic field which produced it. (a) concentric circles Different Control Valve Flow Characteristics. Optimized production requires extensive data analysis - of machines, production lines, entire factories. Among the following statements, the incorrect statement is Prop 30 is supported by a coalition including CalFire Firefighters, the American Lung Association, environmental organizations, electrical workers and businesses that want to improve Californias air quality by fighting and preventing wildfires and reducing air pollution from vehicles. At the centre of current carrying loop the magnetic field appears to be a , Across Check the direction in which the compass needle points and mark the direction. As a result of the EUs General Data Protection Regulation (GDPR). Fuse, Down: 1. Pole pitch is defined as the peripheral distance between the center of two adjacent poles in a DC machine. The disk seals against the seat, which is integral with the body. (d) B if the current is small and A if the current is large. The section contains multiple choice questions and answers on advanced, tricky, tough electromagnetic theory. We promise not to spam you. 2. Question 4. (d) square shape. Electromagnetic induction (a) blue This distance is measured in terms of armature slots or armature conductors that come between two adjacent pole centers. PLCs play a crucial role in the field of automation, using forming part of a larger SCADA system. (d) Left hand thumb rule. Reasons, Solutions. (b) directly below the wire Question 9. Requested URL: byjus.com/ncert-solutions-class-7-science/chapter-14-electric-current-and-its-effects/, User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36. 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