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WorksheetsCapacitor
Total questions: 10
Worksheet time: 5mins
1. Which of the following statements DOES NOT describe a capacitor an electrical device?
A. It stores charge and electrical potential energy.
B. It is manufactured in many sizes and shapes.
C. It is used to smooth out unwanted fluctuations due to power surges in electronic circuits.
D. It allows current to pass through in any condition.
Two capacitors of capacitance C1 and C2 are connected in parallel. What is the effective
capacitance?
C1C2
C1+C2
C11+C21
C1+C2C1C2
In the circuit shown, capacitor C is initially uncharged. At time t = 0, the switch S is closed.
Which of the following statements is correct regarding the charging of the capacitor?
Immediately after S is closed, the current in the circuit rise slowly until a maximum
value.
Immediately after S is closed, the current in the circuit is a maximum, the current then
decreases.
The capacitor is fully charged after a time t = CR
The current in the circuit at any time only depends on the resistance R and is
independent of the capacitance C.
When a charged capacitor is connected in series with a filament lamp and a variable resistor,
the lamp lights up. The lamp will stay lighten for a period if the
Resistance of the resistor is small
Capacitance of the capacitor is large
Resistance of the filament lamp is small
Potential difference across the lamp is small
Capacitor is a device used to__________
store electrical energy
vary the resistance
store magnetic energy
dissipate energy
The capacitance between two plates increases with
Shorter plate area and higher applied voltage
Shorter play area and shorter distance between them
Larger plate area, longer distance between plates and higher applied voltage
Larger plate area and shorter distance between plates
Unit of capacitance is___________
Volts
Farad
Henry
Newton
Inserting a dielectric material between two charged parallel conducting plates, originally separated by air and disconnected from a battery, will produce what effect on the capacitor?
increase charge
increase voltage
increase capacitance
decrease capacitance
Capacitance is measured in___________
Coulombs
Farads
Hz
Volts
