Two stationary coils are placed side by side. The first coil is connected to a power supply. The second coil forms a complete circuit. The current in the first coil is switched off, causing its magnetic field to collapse.
Which statement describes the induced magnetic effect in the second coil while the magnetic field collapses?
The induced field is directed the same way as the original field, causing the field through the second coil to collapse more quickly.
The induced field is directed opposite to the original field, tending to cancel the field remaining through the second coil.
The induced field is directed the same way as the original field, tending to maintain the field through the second coil.
The induced field repeatedly reverses direction as the original field decreases, producing an alternating field in the second coil.
92 exam-style questions on Edexcel GCSE Physics 13.1 Inducing a current, covering 13.1.1 Producing an electric current by induction, 13.1.2 Factors affecting the induced potential difference, 13.1.3 Alternators and dynamos, and 13.1.4 Microphones and loudspeakers. Each one has a worked solution and a mark scheme showing where the marks go.