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3 marksMagnetic Fields

CAPE Physics Unit 2 · 2015 · Paper 2 · Question 4(a)

Magnetic forces on current-carrying conductors.

By using the formula F = BIL\sin\theta, define FULLY the unit of magnetic flux density, the tesla.

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  1. 4(b)(i)Calculate the current drawn from the source.[2 marks]
  2. 4(b)(ii)Redraw Figure 7 and add to your drawing a rough sketch of the magnetic field of the current in Conductor A. Indicate by an arrow on the diagram, the direction…[3 marks]
  3. 4(c)(i)Calculate the value of the magnetic field at B due to the current in A.[2 marks]
  4. 4(c)(ii)Determine the magnitude and direction of the force experienced by EACH centimetre of Wire B due to the magnetic field of the current in Wire A.[2 marks]
  5. 4(d)The calculations carried out in (c)(i) and (c)(ii) ignore the effect of the insulating plastic sheath in which the copper conductors are encased. Deduce the…[3 marks]

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