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Sunday, 16 August 2026
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Physics Past Questions and Answers

Topic: Series R-L-C circuits

Jamb Physics Questions - Series R-L-C circuits

Question 1:
in a series R-L-C circuit at resonance, the voltages across the resistor and the inductor are 30V and 40V respectively, what is the voltage across the capacitor?
  • A 30V
  • B 40V
  • C 50V
  • D 70V
View Answer & Explanation
Question 2:
A capacitor of 20 x 10-12F and an inductor are joined in series. The value of the inductance that will give the circuit a resonance frequency of 200kHz is
  • A I/16 H
  • B I/8 H
  • C I/64 H
  • D I/32 H
View Answer & Explanation
Question 3:
An a.c circuit of e.m.f 12V has a resistor of resistance 8Ω connected in series to an inductor of inductive reactance 16Ω and a capacitor capacitive reactance 10Ω. The current flow in the circuit is
  • A 1.4A
  • B 1.2A
  • C 12.0A
  • D 14.0A
View Answer & Explanation
Question 4:
in a series R-L-C circuit at resonance, the voltages across the resistor and the inductor are 30V and 40V respectively, what is the voltage across the capacitor?
  • A 30V
  • B 40V
  • C 50V
  • D 70V
View Answer & Explanation
Question 5:
A capacitor of 20 x 10-12F and an inductor are joined in series. The value of the inductance that will give the circuit a resonance frequency of 200kHz is
  • A I/16 H
  • B I/8 H
  • C I/64 H
  • D I/32 H
View Answer & Explanation