An RC Circuit Consisting of a 150 µF Capacitor and a 1

question 32

Multiple Choice

An RC circuit consisting of a 150 µF capacitor and a 1 M $\varOmega$ resistor is connected to a 100-V battery for a long time,and then the battery is shorted.After 30 s,a second identical resistor is placed in parallel with the original.What is the voltage across the capacitor 30 s after this?

• A)0 V
• B)54.9 V
• C)75.6 V
• D)84.3 V
• E)100 V