A 12 F capacitor is charged using a 7.0 v battery. The battery is then removed and a 1.5 M resistor is connected to the capacitor.

10.

A 12 μF capacitor is charged using a 7.0 v battery. The battery is then removed and a 1.5 MΩ resistor is connected to the capacitor. How many seconds pass before the voltage across the resistor is 3.0 volts? 

a. 2.1 seconds

b. 6.0 seconds

c. 12.9 seconds

d. 15.3 seconds

11.

A large hunk of metal is in a region of space filled by a uniform E-field (500 v/m). 250 C of charge is then deposited on the metal surface. What E-field will exist within the metal almost instantaneously.

a. Zero; there will be no E-field within the conductor

b. 500 N/m in the same direction as the external field

c. 2 v/m in the direction of the external field

d. 500 v/m in the opposite direction of the external field

12.

Which of the following indicates the greatest capacitance?

a. A capacitor with a charge of 100μC and a voltage of 30 v

b. A capacitor with a charge of 50μC and a voltage of 2 v

c. A capacitor with a charge of 50μC and a voltage of 10 v

d. A capacitor with a charge of 100μC and a voltage of 10 v