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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 66:
Which of the following instruments can be used to measure current in an a.c circuit?
  • A Hot wire ammeter
  • B Moving coil ammeter
  • C Tangent galvanometer
  • D Moving coil galvanometer
View Answer & Explanation
Question 67:
Three 3ω resistance are connected in parallel what is the equivalent resistance?
  • A 1ω
  • B
  • C 3ω
  • D 0.33ω
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Question 68:
Which of the following obeys Ohm's law?
  • A All metals
  • B Diode only
  • C All electrolytes
  • D Glass
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Question 69:
A 40W instrument has a resistance 90 Ohms. On what voltage should it be operated normally
  • A 60V
  • B 150V
  • C 225V
  • D 360V
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Question 70:
In a slide wire bridge, the balance is obtained at a point 25cm from one end of wire 1m long. The resistance to be tested is connected to that end and a standard resistance of 3.6\(\Omega\) is connected to the other end of the wire. Determine the value of the unknown resistance
  • A 3.2\(\Omega\)
  • B 1.4\(\Omega\)
  • C 3.21\(\Omega\)
  • D 1.2\(\Omega\)
View Answer & Explanation