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Monday, 15 June 2026
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Physics Past Questions and Answers

Topic: Capacitors

Jamb Physics Questions - Capacitors

Question 21:
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
View Answer & Explanation
Question 22:
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
View Answer & Explanation
Question 23:
The energy stored in a capacitor of capacitance 10μF carrying a charge of 100μC
  • A 5 x 10<sup style='font-size: smaller;'>4</sup> J
  • B 4 x 10<sup style='font-size: smaller;'>2</sup> J
  • C 4 x 10<sup style='font-size: smaller;'>-3</sup> J
  • D 5 x 10<sup style='font-size: smaller;'>-4</sup> J
View Answer & Explanation
Question 24:
An electron of charge 1.6 x 10-19C is accelerated between two metal plates. If the kinetics energy of the electron is 4.8 x 10-17J, the potential difference between the plate is
  • A 30V
  • B 40V
  • C 300V
  • D 400V
View Answer & Explanation
Question 25:
Given three capacitors 0.3μF, 0.5μF and 0.2μF, the joint capacitance when arranged to give minimum capacitance is
  • A 0.1μF
  • B 0.3μF
  • C 1.0μF
  • D 0.5μF
View Answer & Explanation