# XII_Physics_Electromagnetic Induction_1 Online Test

A small square loop of wire of side/ is placed inside a large square loop of wire of side L (L>>(). The loop are co-planar and their centers coincide. The mutual inductance of the system proportional to
I/L
I2/L
L/I
L2/I
An infinitely long cylinder is kept parallel to an uniform magnetic field B directed along positive z-axis. The direction of induced current as seen from the z-axis will be
zero
Anticlockwise of the +ve z axis
Clockwise of the +ve z axis
Along the magnetic field
A short-circuited coil is placed in a time-varying magnetic field. Electrical power is dissipated due to the current induced in the coil. If the number of turns were to be quadrupled and the wire radius halved, the electrical power dissipated would be
halved
The same
doubled
/
Maximum in situation (a)
Maximum in situation (b)
Maximum in situation (c)
The same in all situation
A coil of wire having inductance and resistance has a connected ring placed coaxially within it. The coil is connected to a battery at time t =0, so that a time-dependent current I1 (t) starts flowing through the coil. If I2 (t) is the current induced in the ring, and B(t) is the magnetic field at the axis of the coil the due to I1(t) then as a function of time (I>0), the product I2(t) B(t)
Increases with time
Decreases with time
Does not vary with time
Passes through a maximum
A coil of inductance 8.4 ml I and resistance 6 ( is connected to a 12 V battery. The current in the coil is 1.0 A at approximately the time
500s
25s
35ms
1 ms
Two identical circular loops of metal wire are lying on a table without touching each other. Loop-A carries a current, which increases with time. In response, the loop-B
Remains stationary
Is attracted by the loop-A
Is repelled by the loop-A
Rotates bout its CM, with CM fixed
The SI unit of inductance, the Henry, can be written as
Weber/ampere
Volt-second/ampere
Joule/(ampere)2
Ohm-second
All of above
A small square loop of wire of side/ is placed inside a large square loop of wire of side L (L>>(). The loop are co-planar and their centers coincide. The mutual inductance of the system proportional to
I/L
I2/L
L/I
L2/I
An infinitely long cylinder is kept parallel to an uniform magnetic field B directed along positive z-axis. The direction of induced current as seen from the z-axis will be
zero
Anticlockwise of the +ve z axis
Clockwise of the +ve z axis
Along the magnetic field
Description:

This test consist of 10 questions.Students should ideally take 10 minutes to complete the test. This test is useful for those students who are preparing for IIT JEE, AIEEE or any other engineering entrance test. This test consist of questions from Electromagnetic Induction and which, in general, is focused in AIEEE and IIT JEE. In this chapter,magnetic flux faraday's law lenz's law eddy current inductance ac generatorare key topic and mostly application based questions are asked.

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