2nd Year Physics Chapter 15 Online MCQ Test for 12th Class Physics Chapter 15 (Electromagnetic Induction)

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.#	Question	Answer
1	When a conductor moves across a magnetic field an emf is set up this emf is called.	A. Variable emf B. Constant emf C. Back emf D. Induced emf
2	Which of the following quantities remain constant in step up transformer?	A. Current B. Voltage C. Power D. Heat
3		A. Lenz's law B. Faraday's law C. Ampere's law D. None of these
4	The north pole of a magnet is brought near a metallic ring. The direction of induced current in the ring will be:	A. Antoclockwise B. Clockwise C. First Clockwise and then Antoclockwise D. First anticlockwise and then Clockwise
5	The movement of conductor in magnetic field produces electrical current was discovered in:	A. 1931 B. 1731 C. 1842 D. 1831
6	The Si unit of Mutual inductance is:	A. VA-1S-1 B. VAS-1 C. VSA-1 D. ASV-1
7	Energy density in an inductor is.	A. Directly proportional to magnetic field B. Directly proportional to square of magnetic field C. Inversely proportional to magnetic field D. Inversely proportional to square of magnetic field
8	The magnitude of back emf:	A. Increases with sped of motor B. Decreases with speed of motor C. Remains same  D. None of above
9	When the back emf in a current is zero, it draws	A. Zero current B. Maximum current C. Minimum current D. Steady average current
10	The  Lenz's law is also statement of:	A. Law of conservation of mass B. Law of conservation of charge C. Law of conservation of energy D. Law of conservation of momentum