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Physics Past Questions and Answers

Topic: Quantitative treatment of force between two parallel current-carrying conductors

Jamb Physics Questions - Quantitative treatment of force between two parallel current-carrying conductors

Question 1:
When two parallel wires carry currents in opposite directions, the force on either wire is
  • A Away from the other wire
  • B Zero, because the currents cancel each other
  • C Twice as much as when the currents are in the same direction
  • D Towards the other wire
View Answer & Explanation
Question 2:
Two insulated charged spheres of different sizes and carrying opposite charges are connected together by a metallic conductor. Current will flow from one sphere to the other until both sphere
  • A Carry the same magnitude and sign of charge
  • B Are at the same potential
  • C Are at the same temperature
  • D Are of the same size
View Answer & Explanation
Question 3:
If two parallel conductors carry currents flowing in the same direction, the conducts will
  • A Attract each other
  • B Repel each other
  • C Both move in the same direction
  • D Have no effect on each other
View Answer & Explanation