This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 8 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is electromagnetic induction? A) The process of charging a body. B) The process of rotating a coil of an electric motor. C) Producing induced current in a coil due to relative motion between a magnet and the coil. D) The process of generating magnetic field due to a current passing through a coil. Show Answer Correct Answer: B) The process of rotating a coil of an electric motor. 2. If the magnetic flux through the circuit through the circuit is increasing, then induced emf acts to ..... the magnetic flux A) Increase. B) Decrease. C) Zero. D) None of these. Show Answer Correct Answer: B) Decrease. 3. Which rule is applied to ascertain the orientation of the area vector for a current-carrying loop? A) The finger rule. B) The thumb rule. C) The right-hand rule. D) The left-hand rule. Show Answer Correct Answer: C) The right-hand rule. 4. A coil carries a current in a magnetic field. The coil experiences a turning effect.Which device uses this effect? A) A d.c. motor. B) An electromagnet. C) A relay. D) A transformer. Show Answer Correct Answer: A) A d.c. motor. 5. How does increasing the magnet's speed affect the current? A) The current increases. B) The current decreases. C) The current remains the same. D) The current fluctuates. Show Answer Correct Answer: A) The current increases. 6. A circular loop of radius 10cm is placed in a magnetic field of strength 0.8T such that the normal to the plane of the loop is perpendicular to the magnetic field lines. What is the magnetic flux through the loop? A) 0Wb. B) 8Wb. C) 0.025Wb. D) 80pi Wb. Show Answer Correct Answer: A) 0Wb. 7. Explain how induction is utilized in electric motors. A) Induction is used to generate heat in electric motors. B) Induction in electric motors is utilized to create torque through the interaction of induced currents and magnetic fields. C) Induction creates a vacuum that powers the motor. D) Induction relies solely on mechanical friction to operate. Show Answer Correct Answer: B) Induction in electric motors is utilized to create torque through the interaction of induced currents and magnetic fields. 8. What is the cause of electromagnetic induction? A) Changing electric field. B) Constant magnetic field. C) Changing magnetic field. D) Constant electric field. E) Both A and C. Show Answer Correct Answer: C) Changing magnetic field. 9. Which of these is literally one of the best scientists of all time? A) Michael Faraday, FRS. B) Cpt. Kathryn Janeway. C) Dr. Hugh Janus, PhD. D) Lucius Tarquinius Priscus. Show Answer Correct Answer: A) Michael Faraday, FRS. 10. The direction of eddy currents is given by A) Fleming's left hand rule. B) Biot-Savart law. C) Lenz's law. D) Ampere-circuital law. Show Answer Correct Answer: C) Lenz's law. 11. How can electromagnetic induction be used in electric vehicles? A) Electromagnetic induction enables wireless charging in electric vehicles. B) It allows for faster battery charging through direct connection. C) Electromagnetic induction is used for regenerative braking in electric vehicles. D) Electromagnetic induction powers the vehicle's air conditioning system. Show Answer Correct Answer: A) Electromagnetic induction enables wireless charging in electric vehicles. 12. In a closed circuit, electric currents are induced so as to oppose the changing magnetic flux as per A) Law of conservation of mass. B) Law of conservation of charge. C) Law of conservation of energy. D) Law of conservation of current. Show Answer Correct Answer: C) Law of conservation of energy. 13. Which of the devices is not based on electromagnetic induction? A) Generator. B) Electrodynamic microphone. C) Transformer. D) Electric motor. Show Answer Correct Answer: D) Electric motor. 14. When a loop of wire is moved across a magnetic field, the current is produced in it is called A) Induced current. B) Photo electric current. C) Alternating current. D) Direct current. Show Answer Correct Answer: A) Induced current. 15. The magnitude of the induced emf in a circuit is equal to the magnetic flux through the circuit A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 16. For a generator model, what is the cause and effect of the model? A) Cause:light turns oneffect:current is produced. B) Cause:magnetic fieldeffect:light is produced. C) Cause:a changing magnetic fieldeffect:current is produced. D) Cause:current in a wireeffect:a magnetic field is produced around the wire. E) Cause:current is producedeffect:magnetic field is changing. Show Answer Correct Answer: C) Cause:a changing magnetic fieldeffect:current is produced. 17. Discuss the factors affecting the magnitude of induced EMF in a coil. A) Number of turns, strength of magnetic field, area of the coil, rate of change of magnetic field, orientation of the coil. B) Color of the coil. C) Length of the wire. D) Temperature of the surroundings. Show Answer Correct Answer: A) Number of turns, strength of magnetic field, area of the coil, rate of change of magnetic field, orientation of the coil. 18. Primary:120 V, 4 ASecondary:8 A. What is the voltage? A) 240 V. B) 180 V. C) 120 V. D) 60 V. Show Answer Correct Answer: D) 60 V. 19. Which is the best method to determine the direction of the induced current? A) Fleming's right-hand rule. B) Fleming's left-hand rule. C) All the above. D) None of the above. Show Answer Correct Answer: A) Fleming's right-hand rule. 20. What is Faraday's Law? A) Faraday's Law states that electric currents can exist without magnetic fields. B) Faraday's Law explains how to create magnetic fields using only heat. C) Faraday's Law describes the relationship between changing magnetic fields and electric currents. D) Faraday's Law is a principle that only applies to static electricity. Show Answer Correct Answer: C) Faraday's Law describes the relationship between changing magnetic fields and electric currents. 21. The gold foil experiment also called as? A) Cathode ray tube experiment. B) The Geiger-Marsden experiment. C) Experimental bombardment of beryllium with alpha rays. D) None of the above. Show Answer Correct Answer: B) The Geiger-Marsden experiment. 22. A rectangular loop is moving out of a uniform magnetic field. What happens to the magnetic flux through the loop? A) It increases. B) It remains constant. C) It decreases. D) It becomes zero. Show Answer Correct Answer: C) It decreases. 23. The phenomenon due to which there is an induced current in one coil due to the current in a neighboring coil is? A) Mutual induction. B) Steady current. C) Electromagnetism. D) Self induction. Show Answer Correct Answer: A) Mutual induction. 24. Thrust a magnet into a coil of wire. While the magnet is being moved toward the coil A) Becomes an electromagnet. B) Has a current in it. C) Both of these. D) Neither of these. Show Answer Correct Answer: C) Both of these. 25. Two coils, X and Y, are placed facing one another a few centimeters apart. When the current in Coil X is increased at a steady rate of 5.0 As$^{-1}$, a constant e.m.f. of 35.0 mV is induced across the terminals of Coil Y. The mutual inductance of this arrangement is A) 0.0007 H. B) 0.012 H. C) 0.025 H. D) 0.037 H. Show Answer Correct Answer: A) 0.0007 H. ← PreviousNext →Related QuizzesClass 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 1Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 2Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 3Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 4Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 5Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 6Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 7Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 9Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 10Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books