Question Detail

PHY 102 Current Electricity Objective Question

Question

As a capacitor charges in an RC circuit, how does the charge on its plates behave?
Options
A It increases exponentially towards a maximum value.
Correct Answer
B It decreases exponentially towards zero.
C It remains constant after an initial rise.
D It oscillates around a steady value.
Correct Answer

Option A is the correct answer.

Detailed Explanation

The graph on page 19 (b) shows the charge 'q' increasing exponentially towards a final value. Page 21 confirms, 'Charge on capacitor plates rises to ~64% of maximum value' and 'The charge on the capacitor increases exponentially with time toward the final value Qf.'

Hint

Refer to the graph of capacitor charge versus time for a charging capacitor on page 19, or the summary on page 21.

Question Info