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Standard XII
Physics
Using Lenz's Law
Question

From which of the following case, the induced current in the loop will not be obtained?
  1. The loop and magnet are moved in one direction with the same speed
  2. The magnet is moved in the direction of the loop
  3. The loop is moved in the direction of the magnet
  4. The loop and magnet are moved in the opposite direction with the same speed

A
The loop and magnet are moved in the opposite direction with the same speed
B
The loop is moved in the direction of the magnet
C
The magnet is moved in the direction of the loop
D
The loop and magnet are moved in one direction with the same speed
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Solution
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A current can be induced in a conducting loop if it is exposed to a changing magnetic field. This change may be produced in several ways; you can change the strength of the magnetic field, move the conductor in and out of the field, alter the distance between a magnet and the conductor, or change the area of a loop located in a stable magnetic field.
So, D is the wrong statement.

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