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Saturday, 13 June 2026
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Physics Past Questions and Answers

Topic: Capacitors

Jamb Physics Questions - Capacitors

Question 11:
A 5-v battery is connected across the plates of a 2.0\(\mu\)F uncharged parallel plate capacitor. The charge on the capacitor after a long time is
  • A 2.5\(\mu\)C
  • B 10.0\(\mu\)C
  • C 20.0\(\mu\)C
  • D 50.0\(\mu\)C
View Answer & Explanation
Question 12:
A parallel plate capacitor of area 10cm2 in vacuum has a capacitance of 10-2\(\mu\)F. What is the distance between the plates?(e[sub][/sub] = 9 x 10-12fm)
  • A 9 x 10<sup style='font-size: smaller;'>-13</sup>m
  • B 9 x 10<sup style='font-size: smaller;'>-7</sup>m
  • C 9 x 10<sup style='font-size: smaller;'>-3</sup>m
  • D 9 x 10<sup style='font-size: smaller;'>7</sup>m
View Answer & Explanation
Question 13:
Which of the following devices may be used to step up the voltage in a d.c. circuit?
  • A A step-up transformer
  • B A d.c. generator
  • C A wattmeter
  • D An induction coil
View Answer & Explanation
Question 14:
A capacitor 8\(\mu\)F is charged to a potential difference of 100V. The energy stored by the capacitor is
  • A 1.0 x 10<sup style='font-size: smaller;'>4</sup>J
  • B 8.0 x 10J
  • C 1.25 x 10J
  • D 4.0 x 10<sup style='font-size: smaller;'>-2</sup>J
View Answer & Explanation
Question 15:
Two capacitors R1 = 4\(\Omega\) and R2 = 5\(\Omega\) are connected in parallel across a potential difference. If P1 and P2 represent power dissipated in R 1 and R2 respectively, then the ratio P1 : P2 is
  • A 4 : 5
  • B 5 : 4
  • C 16 : 25
  • D 25 : 16
View Answer & Explanation