This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction – Quiz 30 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 30 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Why is a galvanometer used in an electromagnetic induction setup? A) To help the current to flow across the conductor. B) To detect the flow of charges. C) To provide charges in the conductor. D) To maintain the amount of current in the conductor. Show Answer Correct Answer: B) To detect the flow of charges. 2. Which of the following increases frequency of AC? A) Increasing number of turns on the coil. B) Using a stronger magnet. C) Rotating the coil faster. D) Increase area of the coil. Show Answer Correct Answer: C) Rotating the coil faster. 3. When a co-worker borrows your phone charger regularly and forgets to return it to you, do you: A) Drop hints at regular intervals. B) Let it go. C) Explain the effect it has on your work, and ask for it back. D) Get angry and demand it back. Show Answer Correct Answer: C) Explain the effect it has on your work, and ask for it back. 4. A coil of wire of 10 turns has across sectional area of 0.08 m2. A magnetic field of 0.4T passes through the coil perpendicular to the plane of the coil. What is the total magnetic flux through the coil? A) 0 Wb. B) 0.16 wb. C) 0.27 Wb. D) 0.32 Wb. Show Answer Correct Answer: D) 0.32 Wb. 5. Motors start with ..... energy and end with ..... energy A) Kinetic, electric. B) Electric, kinetic. C) Potential, magnetic. D) Electric, magnetic. Show Answer Correct Answer: B) Electric, kinetic. 6. What type of core material is used in transformers to decrease losses? A) Air. B) Copper. C) Iron. D) Silver. E) Steel. Show Answer Correct Answer: C) Iron. 7. Can you give an example of an application of electromagnetic induction? A) Electric generators convert mechanical energy into electrical energy using electromagnetic induction. B) Transformers convert electrical energy into mechanical energy using electromagnetic induction. C) Induction cooktops rely on electromagnetic induction to cool food quickly. D) Electric heaters use electromagnetic induction to generate heat. Show Answer Correct Answer: A) Electric generators convert mechanical energy into electrical energy using electromagnetic induction. 8. What is the unit of magnetic flux, which is crucial in electromagnetic induction? A) Tesla. B) Weber. C) Henry. D) Farad. Show Answer Correct Answer: B) Weber. 9. What is necessary to induce a voltage in a wire? A) The wire must cut through magnetic field lines. B) The wire must move along the magnetic field lines. C) The wire must be stationary. D) The wire must be insulated. Show Answer Correct Answer: A) The wire must cut through magnetic field lines. 10. Two identical coaxial coils P and Q carrying equal amount of current in the same direction are brought nearer. The current in A) P increases while in Q decreases. B) Q increases while in P decreases. C) Both P and Q increases. D) Both P and Q decreases. Show Answer Correct Answer: D) Both P and Q decreases. 11. Question 4 A) A. B) B. C) C. D) D. Show Answer Correct Answer: B) B. 12. What type of current do transformers use? A) Direct current. B) Alternating current. C) Pulsating current. D) Static current. Show Answer Correct Answer: B) Alternating current. 13. A wire of length 150 cm carrying an electric current of 0.1 A experiences a force of 6.0X10$^{-3}$ N in a magnetic field. Find the magnitude of the magnetic field. A) 9.0X10$^{-5}$ T. B) 4.0 T. C) 4.0X10$^{-4}$ T. D) 0.04 T. Show Answer Correct Answer: D) 0.04 T. 14. Metal detectors installed for security purposes are based on the principle of A) Potential difference. B) Electromagnetic difference. C) Electromagnetic induction. D) Potential energy. Show Answer Correct Answer: C) Electromagnetic induction. 15. Which of the following principles is the basis for electromagnetic induction? A) Faraday's Law. B) Newton's Third Law. C) Ohm's Law. D) Coulomb's Law. Show Answer Correct Answer: A) Faraday's Law. 16. Faraday's Law is used to determine the ..... A) Magnitude. B) Direction. C) Charge. D) Power. Show Answer Correct Answer: A) Magnitude. 17. Which of the following will not influence the magnetic force acting on a current-carrying conductor? A) The current flowing in the conductor. B) Length of the conductor. C) Magnetic field strength. D) The speed of the conductor. Show Answer Correct Answer: D) The speed of the conductor. 18. What is the consequence/result of motor effect? A) Current. B) Electromotive force. C) Electromagnetic induction. D) Voltage. Show Answer Correct Answer: C) Electromagnetic induction. 19. Magnetic field changes at the rate ot 0.4 T/sec. in a square coil ot side 4 cm. kept perpendicular to the field. It the resistance ot the coil is 2x 10 2, then induced curent in coil is: A) 0.16 A. B) 0.32 A. C) 3.2 A. D) 1.6 A. Show Answer Correct Answer: A) 0.16 A. 20. A coil of wire of 20 turns has across sectional area of 0.1 m$^{2}$. A magnetic field of 0.5T passes through the coil parallel to the plane of the coil. What is the total magnetic flux through the coil? A) 0 Wb. B) 0.5 Wb. C) 0.86 Wb. D) 1 Wb. Show Answer Correct Answer: A) 0 Wb. 21. A motor is a device that ..... A) Converts electrical energy into mechanical energy. B) Converts mechanical energy into kinetic energy. C) Converts mechanical energy into electrical energy. D) Converts electrical energy into kinetic energy. Show Answer Correct Answer: A) Converts electrical energy into mechanical energy. 22. Which of the following correctly, relates the units for magnetic flux and magnetic flux density? A) 1 Wb = 1 T m$^{-3}$. B) 1 Wb = 1 T m$^{-2}$. C) 1 Wb = 1 T m$^{2}$. D) 1 Wb = 1 T m$^{3}$. Show Answer Correct Answer: C) 1 Wb = 1 T m$^{2}$. 23. Calculate the magnetic flux if the magnetic field strength is 2 T and the area is 4 m$^{2}$ . A) 6 Wb. B) 10 Wb. C) 4 Wb. D) 8 Wb. Show Answer Correct Answer: D) 8 Wb. 24. Why there is no induced e.m.f or induced current if the straight wire moved parallel to the magnetic field? A) Fields not touch the wire. B) Fields are stationary. C) Fields are not cut by the wire. D) Weaker fields. Show Answer Correct Answer: C) Fields are not cut by the wire. 25. What type of transformer is used to increase the voltage from power stations. A) Step-down transformer. B) Step-up transformer. C) All the above. D) None of the above. Show Answer Correct Answer: B) Step-up transformer. ← 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