A capacitor and a resistor are connected in series with each other and in series with an accumulator of negligible internal resistance. The potential across the terminals of the capacitor is
A
twice the e.m.f of the accumulator
B
less than the e.m.f by the potential drop across the resistor
C
zero
D
the same as the e.m.f.
E
greater than the e.m.f
Verified Correct Answer: B.
Physical Principles & Numerical Solution
In a series circuit with a capacitor and resistor connected to an accumulator:
The potential across the capacitor is less than the e.m.f. of the accumulator by the voltage drop across the resistor when current flows.
Once the capacitor is fully charged and current stops, the potential across the capacitor will equal the e.m.f. of the accumulator
Source: Myschool Past Questions Archive (Record #29214)