AP® Physics 1 & 2

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Difficult

Steady Current through R4

APPH12-YNCZGN

The circuit shown includes an 80-V battery connected to four $100\space \Omega $ resistors, labeled ${ R }_{ 1 },{ R }_{ 2 },{ R }_{ 3 }$ and $ { R }_{ 4 }$. Resistor ${R}_{ 4 }$ is connected in parallel with a $5 \space\mu F$ capacitor. An ammeter, A, is installed to measure the current through flowing into the capacitor.

After the switch has been closed for a very long time, what is the steady-state current in through ${ R }_{ 4 }$?

A

0.00 amps

B

0.80 amps

C

0.27 amps

D

0.20 amps