Electromagnetism

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Question 12
Medium
a.

The diagram below shows two long horizontal current-carrying wires, AAA and BBB.

Two parallel horizontal wires. Wire A is on top with a current pointing to the right. Wire B is parallel and directly below wire A, carrying a current pointing to the left.

The currents in the two wires flow in opposite directions.

Explain why wire BBB experiences a force and deduce the direction of this force.

[3]
b.

State Lenz's law of electromagnetic induction.

[1]
c.

Describe how a student can perform an experiment in the laboratory to show that the peak electromotive force (e.m.f.) EEE induced in the secondary coil of a transformer is directly proportional to the frequency fff of the alternating current in the primary coil, assuming the peak current in the primary coil is kept constant.

[3]

Electromagnetism Questions

  1. A Level
  2. /Physics
  3. /Electromagnetism