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.)

fig2: Loop moving South, no induced current.

fig2: Loop moving East, induced current b.

fig1: Loop moving West, induced current b.

fig1: Loop moving East, induced current b.

fig1: Loop moving East, induced current a.

fig1: Loop moving West, induced current a.

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.) fig2: Loop moving South, no induced current. fig2: Loop moving East, induced current b. fig1: Loop moving West, induced current b. fig1: Loop moving East, induced current b. fig1: Loop moving East, induced current a. fig1: Loop moving West, induced current a.

Explanation / Answer

Figure 2:

1. Loop moving south, no induced current.

TRUE, as B does not change in that direction.

2. Loop moving east, induced current b.

TRUE, as the B field becomes weaker as it goes to the East. Hence, it must support the field, which it does by having current into the page.

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Figure 1 is not attached here, please check it.

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