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 strength in Figure 2 is represented by the density of dots. Select true or false for the current in the loop. The cardinal directions are as defined in the compass rose. Magnet moving East, induced current 'a'. Fig 2: Loop moving South, induced current 'a'. Fig 2: Loop moving East, induced current 'a'. Fig 2: Loop moving East, no induced current. Fig 1: Magnet moving West, induced current 'a'. Fig 1: Loop moving West, induced current 'a'. First determine if the flux through the loop is increasing, decreasing or unchanged. If the flux is increasing, then the induced current produces a field that is opposite in direction to the field by the existing magnetic field. If the flux is decreasing, then the induced current produces a field that is in the same direction to the field by the existing magnetic field. If the flux is not changing, then there is no induced current. Use the right hand rule (current and magnetic field) to determine the direction of the induced current.

Explanation / Answer

1) false

2) true

3) false

4) true

5) true

6) false

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