This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction – Quiz 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 11 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In a simple generator, what happens when the coil rotates faster? A) The induced voltage decreases. B) The induced voltage increases. C) The magnetic field strength increases. D) The current stops flowing. Show Answer Correct Answer: B) The induced voltage increases. 2. What does Faraday's Law state? A) Magnetic fields do not affect electric currents. B) Electric fields are independent of magnetic fields. C) Induced current is always constant. D) Induced emf is proportional to the rate of change of magnetic flux. Show Answer Correct Answer: D) Induced emf is proportional to the rate of change of magnetic flux. 3. The condition for the phenomena of electromagnetic induction is that there must be a relative motion between A) The galvanometer and magnet. B) The coil of wire and galvanometer. C) The coil of wire and magnet. D) The magnet and galvanometer. Show Answer Correct Answer: C) The coil of wire and magnet. 4. A solenoid of length $l$ A) $\frac{\mu_0N^2A}{l}$. B) $\frac{\mu_0N^2\pi r}{2}$. C) $\mu_0N^2\pi r$. D) $\mu_0N^2A$. Show Answer Correct Answer: A) $\frac{\mu_0N^2A}{l}$. 5. Increasing the magnet's speed affects the electric field by: A) Increasing the electric field strength. B) Decreasing the electric field strength. C) No effect on the electric field. D) Reversing the direction of the electric field. Show Answer Correct Answer: A) Increasing the electric field strength. 6. Magnetic flux involves ..... and ..... A) Magnetic field and surface area. B) Induction and surface area. C) Magnetic field and induction. D) Electromagnetic induction and surface area. Show Answer Correct Answer: A) Magnetic field and surface area. 7. Which direction does a magnetic field point? A) The direction of the force on the north side of a magnet. B) The direction of the force on the south side of a magnet. C) The direction of the force on a coil of wire. D) The direction of the force on an electron. Show Answer Correct Answer: A) The direction of the force on the north side of a magnet. 8. In electromagnetic induction, what is the role of a changing magnetic field? A) It creates a magnetic pole. B) It induces an electric current. C) It increases resistance. D) It decreases voltage. Show Answer Correct Answer: B) It induces an electric current. 9. A metal ring is held horizontally and a bar magnet is dropped through the ring with its length along the axis of the ring. The acceleration of the falling magnet is A) More than g. B) Equal to g. C) Less than g. D) None of these. Show Answer Correct Answer: C) Less than g. 10. If the number of turns in coil is increased to 3 times, its self inductance will ..... A) Increase to 9 times. B) 3 times. C) No change. D) Decrease to 9 times. Show Answer Correct Answer: A) Increase to 9 times. 11. Passing a current through a solenoid will produce A) A magnetic field. B) An electric field. C) A current field. D) Nothing is produced. Show Answer Correct Answer: A) A magnetic field. 12. A Conducting circular loop is placed in a uniform Magnetic field, B= 0.025 T with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of 1 mm/s. The induced emf when the radius is 2 cm is A) $2\mu V$. B) $2\pi\mu V$. C) $\pi\mu V$. D) $\frac{\pi\mu V}{2}$. Show Answer Correct Answer: C) $\pi\mu V$. 13. What is electromagnetic induction in a transformer? A) The current in one coil (of the transformer) causes/induces a voltage (p.d.) in the second coil. B) The voltage (p.d.) in one coil (of the transformer) causes/induces a voltage (p.d.) in the second coil. C) All the above. D) None of the above. Show Answer Correct Answer: B) The voltage (p.d.) in one coil (of the transformer) causes/induces a voltage (p.d.) in the second coil. 14. Observe:Check that Show loop data is on. Move the wire loop up, away from the magnet. Is this motion of the loop equivalent to the magnet moving up or down? A) Yes. B) No. C) It depends on the speed of the loop. D) Only if the magnet is stationary. E) Only if the loop is made of a specific material. Show Answer Correct Answer: A) Yes. 15. ..... rule can be used to determine the direction of the induced current produced. A) Right Hand Palm. B) Right Hand Grip. C) All the above. D) None of the above. Show Answer Correct Answer: B) Right Hand Grip. 16. Fleming's Hand Rules were originated by John Ambrose Fleming, in the late 19th century, as a simple way of working out the direction of motion in an electric motor, or the direction of electric current in an electric generator. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 17. Magnetic flux is measured in A) Teslas. B) Coulombs. C) Webers. D) Farads. Show Answer Correct Answer: C) Webers. 18. What happen to magnetic flux if area of plane in the magnetic field decreases? A) Magnetic flux remains constant. B) Magnetic flux becomes zero. C) Magnetic flux increases. D) Magnetic flux decreases. Show Answer Correct Answer: D) Magnetic flux decreases. 19. What is the relationship between electricity and magnetism? Choose the best answer. A) Electricity is a form of magnetism. B) Magnetism is a form of electricity. C) They are two forms of the same basic force. D) They are not closely related at all. Show Answer Correct Answer: C) They are two forms of the same basic force. 20. A straight wire, 0.5 m long, is moved straight up at a speed of 20 m/s through a 0.4-Tmagnetic field pointed in the horizontal direction.The wire is part of a circuit of total resistance of 6.0 Ohms' . What is the current in the circuit? A) 0.3 A. B) 0.4 A. C) 0.7 A. D) 0 A. Show Answer Correct Answer: C) 0.7 A. 21. What are the applications of electromagnetic induction in everyday life? A) Batteries. B) Wind turbines. C) Applications of electromagnetic induction include electric generators, transformers, induction cooktops, and MRI machines. D) Solar panels. Show Answer Correct Answer: C) Applications of electromagnetic induction include electric generators, transformers, induction cooktops, and MRI machines. 22. Faraday's law of electromagnetic induction states that the electromotive force (emf) induced in a conductor is proportional to A) The change of magnetic flux density. B) The change of magnetic flux linkage. C) The rate of change of magnetic flux density. D) The rate of change of magnetic flux linkage. Show Answer Correct Answer: D) The rate of change of magnetic flux linkage. 23. What does Fleming's Right Hand Rule help determine? A) Direction of induced emf. B) Speed of electric currents. C) Strength of magnetic fields. D) Resistance in circuits. Show Answer Correct Answer: A) Direction of induced emf. 24. Faraday's Law is used to A) Deduce the direction of the induced current. B) Deduce the magnitude of the induced e.m.f. C) Explain how an induced e.m.f. is produced. D) Explain how a changing magnetic field is produced. Show Answer Correct Answer: B) Deduce the magnitude of the induced e.m.f. 25. When a constant current of 5.0 A flows in a 400 turns solenoid of length, l and cross sectional area A, emf is induced in the coil. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. ← 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