For the setup in Figure 1 when you move the bar magnet from

For the setup in Figure 1, when you move the bar magnet from the right to the center of the coil, the voltmeter reads a positive voltage.

a.) When you move the bar magnet from the center of the coil to the left, does the voltmeter read a positive or negative voltage?

b.) When you move the bar magnet from left back to the center of the coil, does the voltmeter read a positive or negative voltage?

c.) For all the cases, when you move the bar magnet faster through the coil, does the induced voltage increase or decrease in magnitude?

3. For the setup in Figure 1, when you move the bar magnet from the right to the center of the coil, the voltmeter reads a positive voltage. (a) When you move the bar magnet from the center of the coil to the left, does the voltmeter read a positive or negative voltage? (b) When you move the bar magnet from left back to the center of the coil, does the voltmeter read a positive or negative voltage? (c) For all the cases, when you move the bar magnet faster through the coil, does the induced voltage increase or decrease in magnitude? Figure 1

Solution

Here,

when the bar magnet is moved from the right to centre , the voltmeter has a positive reading

a) Now , when the bar magnet is moved from the center of the coil to the left,

as the magnetic flux change is in the same direction as first case.

Hence , the voltmeter will have a positive reading

b)

When you move the bar magnet from left back to the center of the coil ,

as the the magnetic flux change is in the opposite direction as first case.

the voltmeter will have a negative reading.

c)

when the magnet is moved faster , the rate of change of magnetic flux is higher ,

hence , the induced voltage increases