Author Question: A 4.0-F capacitor is charged to 6.0-V. It is then connected in series with a 3.0-M resistor and ... (Read 50 times)

mia · **on:** Jul 29, 2018

A 4.0-F capacitor is charged to 6.0-V. It is then connected in series with a 3.0-M resistor and connected to a 12-V battery. How long after being connected to the battery will the voltage across the capacitor be 9.0 V?

A)

5.5 s
B)

7.2 s
C)

8.3 s
D)

12 s
E)

17 s

Question 2

A circular coil of copper wire is lying flat on a horizontal table. A bar magnet is held with its south pole downward, vertically above the center of the coil. The magnet is released from rest and falls toward the coil.

As viewed from above, you can say that, as it falls, the magnet induces A)

counterclockwise current in the loop.
B)

clockwise current in the loop.
C)

no current in the loop.
D)

an emf but no electric current in the loop.
E)

Not enough information is provided.