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Sunday, 21 June 2026
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Physics Past Questions and Answers

Topic: Current Electricity

Jamb Physics Questions - Current Electricity

Question 6:
Two lamps are rated 40W and 220V each are connected in series. The total power dissipated in both lamps is
  • A 10W
  • B 20W
  • C 40W
  • D 80W
  • E None of the above
View Answer & Explanation
Question 7:
An electric cell has an internal resistance of 2 ohms. A current of 0.5A is found to flow when a resistor of 5 ohms resistance is connected across it. What is the electromotive force of the cell?
  • A 5 volts
  • B 3.5 volts
  • C 2.5 volts
  • D 1 volts
  • E 10 volts
View Answer & Explanation
Question 8:
A capacitor and a resistor are connected in series with each other and in series with an accumulator of negligible internal resistance. The potential across the terminals of the capacitor is
  • A Twice the e.m.f of the accumulator
  • B Less than the e.m.f by the potential drop across the resistor
  • C Zero
  • D The same as the e.m.f.
  • E Greater than
View Answer & Explanation
Question 9:
In a given circuit, the cell P has an emf 1.5V and an unknown internal resistance while cell Q has an emf 2.0V and an internal resistance of 1 ohm if the ammeter reads 50m A, Then r is equal to
  • A 0.5 ohm
  • B 0.62 ohm
  • C 1.0 ohm
  • D 2.0 ohm
  • E 3.0 ohm
View Answer & Explanation
Question 10:
An electrical circuit is connected up as shown above, which of the following is correct about the value of current flowing through the 1 ohm resistance?
  • A 12/13A
  • B 13/12A
  • C 1/3A
  • D 3A
  • E 12/7A
View Answer & Explanation