Figure 29.9
1) In Figure 29.9, a bar magnet moves away from the solenoid. The induced current through the resistor R is:
A) from b to a
B) zero
C) from a to b
Figure 29.10
2) In Figure 29.10, a bar is in contact with a pair of parallel rails and is in motion with velocity v. A uniform magnetic field B is present. The induced current through the resistor R is:
A) from b to a
B) from a to b
C) zero
Figure 29.16
3) In Figure 29.16, a long bar slides on two contact points and is in motion with velocity v. A steady, uniform, magnetic field B is present. The induced current through the resistor R is:
A) from a to b
B) zero
C) from b to a
Explam reasoning below
