1. A long straight wire carries a current I as shown in Fig. 21-55. A small loop of wire rests in the plane of the page. Which of the following will not induce a current in the loop?
(a) Increasing the current in the straight wire.
(b) Moving the loop in a direction parallel to the wire.
(c) Rotating the loop so that it becomes perpendicular to the plane of the page.
(d) Moving the loop farther from the wire without rotating it.
(e) Moving the loop farther from the wire while rotating it.

2. Two separate but nearby coils are mounted along the same axis. A power supply controls the flow of current in the first coil, and thus the magnetic field it produces. The second coil is connected only to an ammeter. The ammeter will indicate that a current is flowing in the second coil
(a) Whenever a current flows in the first coil.
(b) Only when a steady current flows in the first coil.
(c) Only when the current in the first coil changes.
(d) Only if the second coil is connected to the power supply by rewiring it to be in series with the first coil.