This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 6 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Electrical energy is transmitted over large distances at high alternating voltages. Which of the following statements is not correct? A) For a given power level, there is a lower current. B) Lower current implies less power loss. C) Transmission lines can be made thinner. D) It is easy to reduce the voltage at the receiving end using step-down transformers. Show Answer Correct Answer: C) Transmission lines can be made thinner. 2. Describe a real-world application of Faraday's Law. A) Solar panels generate electricity by applying Faraday's Law directly to sunlight. B) Electric heaters convert electrical energy into thermal energy using Faraday's Law. C) Electric cars use Faraday's Law to charge their batteries while driving. D) Electric generators convert mechanical energy into electrical energy using Faraday's Law. Show Answer Correct Answer: D) Electric generators convert mechanical energy into electrical energy using Faraday's Law. 3. Which is the only type of current that will work with transformers? A) Direct current. B) Alternating current. C) Resistance. D) None of the above. Show Answer Correct Answer: B) Alternating current. 4. Calculate the magnetic flux density of a magnetic field at the 50 turns having the radius of 0.5 m and carrying a current of 5A. A) 3.12 x 10-12 T. B) 3.12 x 10-8 T. C) 3.12 x 10-6 T. D) 3.12 x 10-4 T. Show Answer Correct Answer: D) 3.12 x 10-4 T. 5. Observe:Move the wire loop down, towards 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 stationary. Show Answer Correct Answer: A) Yes. 6. According to Lenz's law, the direction of the induced current is such that it opposes the change in ..... A) Electric field. B) Velocity. C) Magnetic flux. D) Temperature. Show Answer Correct Answer: C) Magnetic flux. 7. An electric current can produce a magnetic field. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 8. What benefit is gained by the addition of the iron core in an electromagnet? A) It makes a strong magnet weaker. B) It makes a weak magnet stronger. C) There is no benefit at all. D) It lets currents interact with each other. Show Answer Correct Answer: B) It makes a weak magnet stronger. 9. Predict:Do you think you can induce an electric current in the wire loop by moving or rotating the loop? A) Yes, because moving or rotating the loop changes the magnetic field through the loop. B) No, because moving or rotating the loop does not affect the magnetic field. C) Yes, but only if the loop is made of a magnetic material. D) No, because the loop needs to be connected to a power source. Show Answer Correct Answer: A) Yes, because moving or rotating the loop changes the magnetic field through the loop. 10. SI unit for self inductance, L is A) Tesla(T). B) Weber(Wb). C) Henry(H). D) Farad (F). Show Answer Correct Answer: C) Henry(H). 11. A charged particle is injected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will ..... : A) Move in a straight line. B) Follow a spiral path. C) Move along a parabolic path. D) Move along a waveform. E) Follow a circular path. Show Answer Correct Answer: E) Follow a circular path. 12. For an electromagnet (or motor) model, what is the cause and effect of the model? A) Cause:light turns oneffect:current is produced. B) Cause:magnetic field changeseffect:battery 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:batteryeffect:magnetic field around the wire. Show Answer Correct Answer: D) Cause:current in a wireeffect:a magnetic field is produced around the wire. 13. Faraday's Law states that the induced emf is proportional to ..... A) The current. B) The cross sectional area of the coil. C) The rate of change in the flux of the coil. D) None of the above. Show Answer Correct Answer: C) The rate of change in the flux of the coil. 14. Lenz's Law of electromagnetic induction is about the conservation of A) Energy. B) Mass. C) Charges. D) Momentum. Show Answer Correct Answer: C) Charges. 15. Who discovered the phenomenon of electromagnetic induction? A) Michael Faraday. B) James Clerk Maxwell. C) Thomas Edison. D) Nikola Tesla. Show Answer Correct Answer: A) Michael Faraday. 16. What is the effect of increasing the number of turns in a coil on the induced voltage? A) Decreases the voltage. B) Increases the voltage. C) No effect on the voltage. D) Reverses the voltage direction. Show Answer Correct Answer: B) Increases the voltage. 17. 1 Henry is equivalent to A) Weber.Tesla. B) V.s/A. C) Tesla/s. D) Weber.A/s. Show Answer Correct Answer: B) V.s/A. 18. A coil and bulb are connected in series with a 5V AC source.When a soft iron core is inserted in the coil, the light emerging from the bulb is ..... A) Increases. B) Decreases. C) Remains same. D) Becomes off. Show Answer Correct Answer: B) Decreases. 19. Which statement is incorrect about alternating current? A) The root-mean-square (r.m.s.) of an alternating current is the value of the direct current, that dissipates heat energy at the same rate in a resistor. B) The r.m.s current $I_{rms}=\sqrt{2}I_o$ $I_o$. C) The peak power is twice the mean power. D) The heating effect is given by = $I_{rms}^2R$. Show Answer Correct Answer: B) The r.m.s current $I_{rms}=\sqrt{2}I_o$ $I_o$. 20. The direction of induced current is given by which law? A) Ampere's law. B) Coulomb's law. C) Lenz's law. D) Ohm's law. E) Faraday's law. Show Answer Correct Answer: C) Lenz's law. 21. Which device use the concept of mutual inductance? A) DC generator. B) Transformer. C) Working coil galvanometer. D) Wheatstone bridge. Show Answer Correct Answer: B) Transformer. 22. State Lenz's Law in the context of electromagnetic induction. A) The induced current in a circuit accelerates the change in magnetic flux that produced it. B) The induced current in a circuit opposes the change in magnetic flux that produced it. C) Lenz's Law states that the induced current in a circuit is always zero. D) The induced current in a circuit follows the change in magnetic flux that produced it. Show Answer Correct Answer: B) The induced current in a circuit opposes the change in magnetic flux that produced it. 23. How does the direction of induced current relate to Lenz's Law? A) The induced current flows in the same direction as the change in magnetic flux. B) The induced current flows in a direction that opposes the change in magnetic flux. C) The induced current has no relation to the change in magnetic flux. D) The induced current flows randomly without any specific direction. Show Answer Correct Answer: B) The induced current flows in a direction that opposes the change in magnetic flux. 24. Which best reflects Faraday's Law? $\nabla\times E=-\frac{\delta B}{\delta t}$ A) A coil of wire creates a magnetic field. B) A current through a wire creates a magnetic field. C) A magnet near a wire creates a current. D) An electric field exerts a force on the poles of a magnet. Show Answer Correct Answer: B) A current through a wire creates a magnetic field. 25. Why is magnetic induction important? A) Electromagnets are very versatile. B) Every electric motor uses induction. C) Because it's an easy way to produce electricity. D) All of the above. Show Answer Correct Answer: D) All of the above. ← 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 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 10Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books