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12 Magnetism and the motor effect

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Question 9

A current-carrying conductor in an electromagnetic switch moves a contact when it experiences a magnetic force. The conductor is at right angles to the magnetic field. A force of 0.060 N is required to move the contact. The magnetic flux density is 0.25 T0.25\ \text{T}0.25 T and a length of 0.12 m of the conductor is inside the field.

Calculate the current in the conductor.

Use the equation

F=B×I×lF = B \times I \times lF=B×I×l

[2]
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12 Magnetism and the motor effect Questions

  1. GCSE
  2. /Physics
  3. /12 Magnetism and the motor effect

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