WorksheetsCapacitor
Total questions: 15
Worksheet time: 6mins
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 X and Y of capacitances 2 F and 4 F respectively are connected in series with
a 12 battery. Which of the following statements is CORRECT?
The effective capacitance is 6 F.
Capacitors have the same charge of 36 C.
The potential difference across the capacitor X is 8 V.
The potential difference across the capacitors Y is 12 V.
Which of the following statements is NOT TRUE about capacitance?
The ratio of the total charge on either plate to the potential difference between both
plates.
The unit is CV-1
A device consist two metal plates separated by insulator.
The unit is Farad.
Three capacitors 1.0 μ F, 1.5 μ F and 2.0 μ F are connected in series. What is the equivalent
capacitance of the capacitors?
4.50 μ F
2.17 μ F
0.46 μ F
0.25 μ F
What is the potential difference across a capacitor on a 5 μ F when the charge of capacitor is
120 μ C?
21 V
22 V
23 V
24 V
Two capacitors, 1.0 μ F and 0.5 μ F are connected in series to a 100 V current supply. What is
the amount of charge stored in the 1.0 μ F?
150 μ C
100 μ C
50 μ C
33 μ C
Capacitor C1 is connected across a battery of 5 V. An identical capacitor C2 is connected
across a battery of 10 V. Which one has the most charge?
C1
C2
both have the same charge
it depends on other factors
Two capacitors of capacitance C1 and C2 are connected in parallel. What is the effective
capacitance?
C1C2
C1+C2
C11+C21
C1+C2C1C2
Which of the following statements is described a charge on capacitors P, Q and R as shown
in FIGURE 17.1.
The charge in P is more than the charge in Q and R.
The charge in Q is more than the charge in P and R.
The charge in R is more than the charge in P and Q.
The total charge in Q and R is more than the charge in P.
Which of the following statement are CORRECT about the FIGURE 17.2?
Charge across C2 and C3 are same.
Voltage across C1 and C2 are same.
Total capacitance is 2.25 μ F
Total voltage across C2 and C3 are 16 V
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.
Determine the equivalent capacitance in the circuit shown in FIGURE 17.4 when C = 1 pF.
81pF
83pF
41pF
21pF
What is the equivalent capacitance of the combination in FIGURE 17.5 if C = 2 μ F
8.0 μ F
1.5 μ F
3.3 μ F
0.8 μ F
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
A capacitor of capacitance C is charged using a battery. The charge on the capacitor is Q and
the potential difference across it is V. The battery is removed, and an identical capacitor
which is not charged is connected in parallel to the charged capacitor. Which of the
following statements is correct?
The final charge on each capacitor is 2Q
The potential difference across both the capacitors is V
Total energy stored remains the same
The effective capacitance is 2C
