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 by Faraday's Law, with the direction determined by Lenz' Law. The magnetic field is shown by the x's in Fig. 2. Choose true or false for each statement for the current in the loop. (The compass directions are defined in the usual way.) Loop moving North, induced current a. Magnet moving East, induced current a. Loop moving West, induced current b. Loop moving West, induced current b. Loop moving North, induced current b. Loop moving South, induced current a.

Explanation / Answer

geometric North is opposite to the bar magnet North

so if the loop moving North,then flux through the loop decreases,hence the according to lenz's law ,the induced current sould increase the flux through the loop ,For this the direction of current should be b

hence the statement 1) is false

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in fig 1) the induced current a

so statement 2) is true

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in fig 1)

the induced current a

so statement 3) is False

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in fig 2)

the induced current is b )
so statement 4) is TRUE

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in fig 2)

the induced current is b

so statement 5) is TRuE

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in fig2)

the induced current is a

So statement 6) is TRUE

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