Q62 / 90 · JEE Main 2021 (31 Aug Shift 2) · Physics

A coil is placed in a magnetic field B→ as shown below :
Figure
A current is induced in the coil because B→ is :

  • A
    parallel to the plane of coil and increasing with time
  • B
    outward and increasing with time
  • Correct answer
    C
    outward and decreasing with time
  • D
    parallel to the plane of coil and decreasing with time

Solution

Lenz's law state that the direction of the induced current is such that it opposes its cause of generation, so, 

Figure
B→, must not be parallel to the plane of coil for non-zero flux and according to Lenz's law if B is outward it should be decreasing for anticlockwise induced current.

Hence, the correct answer is option: 'C'.

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