Question

As the charge of a capacitor reaches its maximum, the resistance to current flow

a. reaches minimum

b. reaches maximum

c. is unaffected

d. is immeasurable

Answer 1

When capacitors are connected across a direct current DC supply voltage they become charged to the value of the applied voltage, acting like temporary storage devices and maintain or hold this charge indefinitely as long as the supply voltage is present.

During this charging process, a charging current, ( i ) will flow into the capacitor opposing any changes to the voltage at a rate that is equal to the rate of change of the electrical charge on the plates.

This charging current can be defined as: i = CdV/dt. Once the capacitor is “fully-charged” the capacitor blocks the flow of any more electrons onto its plates as they have become saturated.

therefore the resistance to current flow reaches maximum