The figures below show two different situations where a current may be induced i

Question

The figures below show two different situations where a current may be induced in a loop according to Faraday's Law, with the direction given by Lenz' Law. The magnetic field is shown by the x's in Fig. 2. Select true or false for the current in the loop. (The compass directions are defined in the usual way.)

True/ False fig2: Loop moving North, induced current 'b'.
True/ False  fig1: Magnet moving East, induced current 'a'.
True/ False  fig1: Magnet moving West, induced current 'a'.
True/ False  fig1: Loop moving West, induced current 'a'.
True/ False  fig2: Loop moving East, induced current 'b'.
True/ False  fig2: Loop moving South, no induced current.

Explanation / Answer

according to Lenz's law .

the magnetic field due to induced current always oppose the change due to which the

current is induced,

hence ,

False fig2: Loop moving North, induced current 'b'.
False fig1: Magnet moving East, induced current 'a'.
True fig1: Magnet moving West, induced current 'a'.
True fig1: Loop moving West, induced current 'a'.
True fig2: Loop moving East, induced current 'b'.
True fig2: Loop moving South, no induced current

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