This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction – Quiz 32 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 32 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Consider an inductor whose linear dimensions are tripled and the total number of turns per unit length is kept constant, what happens to the self-inductance? A) 9 times. B) 3 times. C) 27 times. D) 13 times. Show Answer Correct Answer: B) 3 times. 2. If the speed of a moving magnet through a coil is doubled, what happens to the induced voltage? A) It is halved. B) It remains the same. C) It is doubled. D) It is quadrupled. Show Answer Correct Answer: C) It is doubled. 3. The process of creating a current in a circuit by changing a magnetic field A) Electric generator. B) Electric motor. C) Electromagnetic induction. D) Magnet. Show Answer Correct Answer: C) Electromagnetic induction. 4. The d.c generator and a.c generator make use of electromagnetic induction to produce ..... A) Force. B) Electricity. C) Energy. D) Power. Show Answer Correct Answer: B) Electricity. 5. How does mutual induction occur between two coils? A) Mutual induction happens when a static magnetic field is applied to one coil. B) Mutual induction requires physical contact between the two coils. C) Mutual induction occurs only when both coils are connected to the same power source. D) Mutual induction occurs when a changing current in one coil induces an EMF in a nearby coil due to the changing magnetic field. Show Answer Correct Answer: D) Mutual induction occurs when a changing current in one coil induces an EMF in a nearby coil due to the changing magnetic field. 6. A ..... means of insulated copper wire wound closely in the form of a helix A) Toroidal solenoid. B) Solenoid. C) Cyclotron. D) Conductor. Show Answer Correct Answer: B) Solenoid. 7. What is the effective voltage of an AC generator with a peak voltage of 200 V? A) 100 V. B) 141 V. C) 200 V. D) 282 V. Show Answer Correct Answer: B) 141 V. 8. A(n) ..... electric current will create a changing magnetic field. A) Existing. B) Direct. C) Alternating. D) Stable. Show Answer Correct Answer: C) Alternating. 9. Faraday demonstrated that an electric current can be created by ..... A) Having a magnet near by. B) Moving a magnet near a wire. C) Hooking a wire up to a battery. D) Running a generator. Show Answer Correct Answer: B) Moving a magnet near a wire. 10. Which item does NOT use an electromagnet. A) A Ferris wheel. B) A doorbell. C) A galvonometer. D) A handheld compass. Show Answer Correct Answer: D) A handheld compass. 11. Calculate potential difference in the secondary coil based on the information given below.Vp = 240 VNp = 20Ns = 125Vs? A) 1500. B) 500. C) 1000. D) 2000. Show Answer Correct Answer: A) 1500. 12. A current-carrying conductor can induce current to another conductor. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 13. Explain Flemming's Right Hand Rule and its application. A) Fleming's Right Hand Rule is applied in physics to determine the direction of the force on a current-carrying conductor in a magnetic field. B) Fleming's Right Hand Rule is used to determine the speed of light in a vacuum. C) Fleming's Right Hand Rule is used to measure the temperature of a substance. D) Fleming's Right Hand Rule is used to calculate the resistance of a circuit. Show Answer Correct Answer: A) Fleming's Right Hand Rule is applied in physics to determine the direction of the force on a current-carrying conductor in a magnetic field. 14. Describe the basic principle of a transformer. A) A transformer operates based on the principle of nuclear fusion. B) A transformer operates based on the principle of gravitational force. C) A transformer operates based on the principle of chemical reactions. D) A transformer operates based on the principle of electromagnetic induction. Show Answer Correct Answer: D) A transformer operates based on the principle of electromagnetic induction. 15. In 1831 who discovered electromagnetic induction? A) Thomas Edison. B) Nikola Tesla. C) Michael Faraday. D) None of the above. Show Answer Correct Answer: C) Michael Faraday. 16. It is the measurement of the total magnetic field which passes through a given area. A) Magnetic Flux. B) Electromagnetic Flux. C) Electric Flux. D) Electromotive Flux. Show Answer Correct Answer: A) Magnetic Flux. 17. Which metal is used for the core of a transformer? A) Aluminium. B) Copper. C) Soft iron. D) Steel. Show Answer Correct Answer: C) Soft iron. 18. In an AC generator, the contacts are made from a soft but highly conductive material, usually carbon, and are called ..... A) Coils. B) Armatures. C) Slip Rings. D) Brushes. Show Answer Correct Answer: D) Brushes. 19. As electrons move, they make A) Electromagnetism. B) Auroras. C) Ferromagnetism. D) Magneticfields. Show Answer Correct Answer: D) Magneticfields. 20. Explain the concept of self-induction. A) Self-induction occurs when a coil generates heat due to resistance. B) Self-induction refers to the ability of a coil to repel magnetic fields from other coils. C) Self-induction is the process of a coil storing energy in a magnetic field without any current. D) Self-induction is the process by which a changing current in a coil induces an electromotive force in itself. Show Answer Correct Answer: D) Self-induction is the process by which a changing current in a coil induces an electromotive force in itself. 21. Explain the concept of eddy currents. A) Eddy currents are induced electric currents that flow in loops within conductors due to changing magnetic fields. B) Eddy currents are always harmful and cause overheating in all materials. C) Eddy currents are a type of fluid flow in liquids. D) Eddy currents are static charges that build up on the surface of conductors. Show Answer Correct Answer: A) Eddy currents are induced electric currents that flow in loops within conductors due to changing magnetic fields. 22. Which quantity is increased in a step-down transformer?(a) (b) Voltage (c) (d) A) Current. B) Voltage. C) Power. D) Frequency. Show Answer Correct Answer: A) Current. 23. Ratio of currents in transformer is equal to ratio of ..... A) Number of iron sheets in core. B) Number of coil. C) Inverse ratio of number of turns. D) Number of electromagnetic. Show Answer Correct Answer: C) Inverse ratio of number of turns. 24. You hold a flat, square loop of wire in a uniform magnetic field that is pointing from left to right. To make the magnetic flux through the loop equal to ZERO, how must you orient the loop? A) Hold it "face-on" to the field, like a window facing the wind. B) Hold it "edge-on" to the field, like a knife-edge cutting the wind. C) Hold it at a 45-degree angle to the field. D) It is impossible for the flux to be zero unless the magnetic field is zero. Show Answer Correct Answer: B) Hold it "edge-on" to the field, like a knife-edge cutting the wind. 25. The north pole of a bar magnet is rapidly introduced into a solenoid at one end (say A). Which of the following statements correctly depicts the phenomenon taking place? A) No induced emf is developed. B) The end A of the solenoid behaves like a south pole. C) The end A of the solenoid behaves like a north pole. D) The end A of the solenoid acquires positive potential. Show Answer Correct Answer: C) The end A of the solenoid behaves like a north pole. ← 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 8Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 9Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books