1. An 8µF capacitor is connected in series with a 0.5 megaohm resistor. The DC voltage supply is 200V. Calculate the time constant.
A. 1s
B. 2s
C. 3s
D. 4s
2. An 8µF capacitor is connected in series with a 0.5 megaohm resistor. The DC voltage supply is 200V. Calculate the initial charging current.
A. 100 µn
B. 500 µA
C. 400 µA
D. 1000µA
3. A 8 µ F capacitor is connected in series with a 0.5 megaohm resistor. The DC voltage supply is 200V. Calculate the time taken for the potential difference across the capacitor to grow to 160V.
A. 6.93s
B. 7.77s
C. 2.33s
D. 3.22s
4. An 8µF capacitor is connected in series with a 0.5 megaohm resistor. The DC voltage supply is 200V. Calculate the voltage in the capacitor 4s after the power is supplied.
A. 123.4V
B. 126.4V
C. 124.5V
D. 132.5V
5. An 8µF capacitor is connected in series with a 0.5 megaohm resistor. The DC voltage supply is 200V. Calculate the current in the capacitor 4s after the power is supplied.
A. 79 µA
B. 68 µA
C. 48 µA
D. 74 µA
6. A circuit has a resistance of 2 ohms connected in series with a capacitance of 6F. Calculate the discharging time constant.
A. 3
B. 1
C. 12
D. 8
7. What is the energy in a capacitor if the voltage is 5V and the charge is10C?
A. 25J
B. 35J
C. 54J
D. 55J
8. A CR network is one which consists of _________
A. A capacitor and resistor connected in parallel
B. A capacitor and resistor connected in series
C. A network consisting of a capacitor only
D. A network consisting of a resistor only
9. At DC, capacitor acts as _________
A. Open circuit
B. Short circuit
C. Resistor
D. Inductor
10. In an RC series circuit, when the switch is closed and the circuit is complete, what is the response?
A. Response does not vary with time
B. Decays with time
C. Increases with time
D. First increases, then decrease