A current-carrying conductor and a permanent magnet are each held stationary by a separate force sensor. The magnetic interaction pushes the conductor to the east with a force of 0.20 N.
Which statement about the forces exerted by the two sensors is correct?
Each sensor exerts a force of 0.20 N: the conductor's sensor acts to the west and the magnet's sensor acts to the east.
Only the conductor's sensor exerts a force of 0.20 N to the west; the magnet's sensor exerts no force.
Neither sensor exerts a force because the equal magnetic forces cancel across the two-object system.
Each sensor exerts a force of 0.20 N: the conductor's sensor acts to the east and the magnet's sensor acts to the west.
86 exam-style questions on Edexcel GCSE Physics 12.3 The motor effect, covering 12.3.1 The motor effect, 12.3.2 Fleming's left-hand rule, 12.3.3 Force on a conductor, and 12.3.4 Electric motors. Each one has a worked solution and a mark scheme showing where the marks go.