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Monday, 22 June 2026
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Physics Past Questions and Answers

Topic: Current Electricity

Jamb Physics Questions - Current Electricity

Question 71:
Three resistors with resistance 200Ω, 500Ω and 1kΩ are connected in series. A 6v battery is connected to either end of the combination. Calculate the potential difference between the ends of 200Ω resistance.
  • A 0.71V
  • B 0.7V
  • C 0.82V
  • D 0.8V
View Answer & Explanation
Question 72:
Which of the following characteristics of a wave is used in the measurement of the depth of the Sea?
  • A Diffraction
  • B Interference
  • C Refraction
  • D Reflection
View Answer & Explanation
Question 73:
In a series R-L-C circuit at resonance, the voltages across the resistor and the inductors are 30V and 40V respectively.

What is the voltage across the capacitor?
  • A 30V
  • B 40V
  • C 50V
  • D 70V
View Answer & Explanation
Question 74:
A cell whose internal resistance is 0.55\(\Omega\) delivers a current of 4 A to an external resistor. The lost voltage of the cell is?
  • A 4.00 V
  • B 2.20 V
  • C 0.15 V
  • D 8.00 V
View Answer & Explanation
Question 75:
A 35 kΩ is connected in series with a resistance of 40 kΩ. What resistance R must be connected in parallel with the combination so that the equivalent resistance is equal to 25 kΩ?
  • A 40 kΩ
  • B 37.5 kΩ
  • C 45.5 kΩ
  • D 30 kΩ
View Answer & Explanation