Energy stored in a capacitor - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 2019

If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

A. 84400m
B. 69000m
C. 61440m
D. 24000m

Question 2:

• JAMB 1992

A capacitor of 10µF is connected across a cell of 12 volts as shown above, calculate the energy stored in the capacitor

A. 7.2 x 10^-4J
B. 1.4 x 10^-3J
C. 1.4 x 10^-3J
D. 1.2 x 10^-2J

Question 3:

• JAMB 1994

A capacitor 8\(\mu\)F is charged to a potential difference of 100V. The energy stored by the capacitor is

A. 1.0 x 10⁴J
B. 8.0 x 10J
C. 1.25 x 10J
D. 4.0 x 10^-2J

Question 4:

• 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 5:

• JAMB 2001

The diagram above shows two capacitors P and Q of capacitance 2μF and 4μF respectively connected to a d.c source. The ratio of energy stored in P to Q is

A. 4:1
B. 2:1
C. 1:4
D. 1:2