A resistor and a capacitor are connected in series to an ideal battery of constant terminal voltage 20.0 V. When the series combination reaches its steady state, the difference in potential across the resistor is
A) larger than 20.0 V.
B) 20.0 V.
C) smaller than 20.0 V.
D) zero.

Question

Quizplus · Accepted Answer

In the steady state, the capacitor is fully charged and acts like an open circuit, meaning no current flows through the resistor. Since the voltage drop across a resistor is directly proportional to the current (V=IR), with no current, the voltage drop across the resistor is zero volts.

A Resistor and a Capacitor Are Connected in Series to an Ideal