Question: Use Lenzs law to answer the following questions concerning the direction of induced currents. (a) What is the direction of the induced current in resistor

Use Lenz€™s law to answer the following questions concerning the direction of induced currents.
(a) What is the direction of the induced current in resistor R in Figure P31.28a when the bar magnet is moved to the left?
(b) What is the direction of the current induced in the resistor R immediately after the switch S in Figure P31.28b is closed? (c) What is the direction of the induced current in R when the current I in Figure P31.28c decreases rapidly to zero?
(d) A copper bar is moved to the right while its axis is maintained in a direction perpendicular to a magnetic field, as shown in Figure P31.28d. If the top of the bar becomes positive relative to the bottom, what is the direction of the magnetic field?

CCC (a) (b) (c) (d)

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