ECAT Pre Computer Science Chapter 15 MCQ Test With Answer

Top Scorers Of ECAT Physics Chapter 15 Electromagnetic Induction MCQ`s Test

Sr.#	Question	Answer
1	The induced current in the loop can be increased by:	A. Using a stronger magnetic field B. Moving the loop faster C. Replacing the loop by a coil of many turns D. All above
2	Back emf is produced due to	A. Self induction B. Mutual induction C. A.C D. Lenz's law
3	Which of the following is most suitable as the core of transformer	A. Soft iron B. Alinco C. Steel D. None of these
4	Referring to above figure, a changing current in coil P can be produced:	A. At the instant the switch is closed B. At the instant the switch is opened C. With the help of rheostat D. All of these
5	A metal road of length 1m is moving at a speed of 1 ms^-1In a direction making angle of 30º with 0.5 Y magnetic field. The emf produced in the rod is:	A. 0.25 N B. 0.25 V C. 2.5 V D. 2.5 N
6	Micheal Faraday and joseph Henry belong respectively to:	A. USA and England B. England and France C. England and USA D. USA and France
7	An induced current can be produced by:	A. Constant magnetic field B. Changing magnetic field C. Varying magnetic field D. Constant electric field
8	Lenz's law is the consequence of	A. Mass B. Energy conservation C. Momentum conservation D. Charge
9	When the conductor moved across a magnetic field:	A. Emf induced is similar to that of a battery B. Emf induced gives rise to induced current C. An emf induced across its ends D. All are correct
10	Which of the following quantities remain constant in step up transformer?	A. Current B. Voltage C. Power D. Heat