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12.1 Magnets and magnetic fields

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Question 6

Two small bar magnets are held with their north poles facing each other.

The repulsive force, FFF, between the magnets can be calculated using the equation:

F=kd2 F = \frac{k}{d^2} F=d2k​

where:

  • k k\,k is a constant
  • d d\,d is the distance between the magnets.

The magnets are positioned 6.0 cm apart.

The repulsive force measured between them is 0.50 N.

Calculate the value of kkk.

State the unit.

[3]
Markscheme

12.1 Magnets and magnetic fields Questions

  1. GCSE
  2. /Physics
  3. /12.1 Magnets and magnetic fields

30 exam-style questions on Edexcel GCSE Physics 12.1 Magnets and magnetic fields, covering 12.1.1 Magnetic poles, 12.1.2 Magnetic materials; permanent and induced magnets, 12.1.3 Magnetic fields, and 12.1.4 Plotting compasses and the Earth's magnetic field. Each one has a worked solution and a mark scheme showing where the marks go.

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