Question

An uncharged capacitor is connected to a resistor and a battery. Choose what happens to current, potential difference and charge right after the circuit is closed. An uncharged capacitor is connected to a resistor and a battery. Choose what happens to current, potential difference and charge right after the circuit is closed.

Potential difference across the capacitor starts high and then drops exponentially.
Current through the circuit starts with zero and then increases gradually to a maximum value.
Charge on the plates of the capacitor decreases with time.
Charge on the plates of the capacitor increases with time.
Charge on the plates of the capacitor doesn't change with time.
Potential difference across the capacitor starts with zero and then increases gradually to a maximum value.
Current through the circuit starts high and then drops exponentially.

Answer 1

• The charge on the plates will increase with time

• The potential difference across the capacitor starts with zero and then increases gradually to a maximum value

• The current through the circuit starts high and then drops exponentially

Step-by-step explanation:

Case : An uncharged capacitor is connected to a resistor and a battery in a closed circuit.

• The charge on the plates will increase with time

applying this equation : Q =
`Q_(0) [ 1 - e^{(-t)/(RC) } ]` as the value of (t) increases the value of Q increases i.e. charge on the plates

• The potential difference across the capacitor starts with zero and then increases gradually to a maximum value

applying this equation : V =
`V_(0) [ 1 - e^{(-t)/(RC) } ]`

• The current through the circuit starts high and then drops exponentially

current : I =
`I_(0) e^{(-t)/(RC) }`