Capacitors - Jamb Physics Past Questions and Answers

Question 16:

• JAMB 1997

Two 50\(\mu\)F parallel plate capacitors are connected in series. The combined capacitor is then connected across a 100-V battery. The charge on each plate of the capacitor is

A. 5.00 x 10^-5C
B. 2.50 x 10^-3C
C. 1.25 x 10^-3C
D. 1.00 x 10^-2C

Question 17:

• JAMB 1998

A parallel plate capacitor has a common plate area of 5 x 10^-8m² and plate separation of 2 x 10³m, Assuming free space, What is the capacitance? [\(\varepsilon\)_o = 9.0 X 10^-12C²N^-1m^-2]

A. 2.25 x 10^-17F
B. 4.50 x 10^-17F
C. 2.25 x 10^-16F
D. 4.50 x 10^-16F

Question 18:

• JAMB 1999

In the circuit above, The potential across each capacitor is 100V. The total energy stored in the two capacitors is

A. 3.0 x 10⁴J
B. 3.0 x 10²J
C. 2.5 x 10^-2J
D. 6.0 x 10^-3J

Question 19:

• JAMB 2000

The diagram above shows two capacitors P and Q of capacitance 5μF and 10μF. Find the charges stored in P and Q respectively

A. 2μC and 4μC
B. 4μC and 2μC
C. 100μC and 200μC
D. 200μC and 100μC

Question 20:

• JAMB 2001

when a piece of rectangular glass block is inserted between two parallel capacitor,at constant plate area and distance of separation, the capacitance of the capacitor will

A. Increase
B. Decrease
C. Decrease then increase
D. Remain constant