B: solar panels
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The coil in an electric motor is wound onto a cylinder. Why is the cylinder made of soft iron?
The electromotive force (e.m.f.) induced in a conductor moving at right-angles to a magnetic field does not depend upon
The diagram shows part of an a.c. generator when its coil is in a horizontal position. The graph shows the voltage ou…
A hard stone hits the ground and comes to rest almost immediately. As the stone hits the ground, what is the directio…
A car of mass 1500 kg is towing a trailer of mass 1100 kg along a level road. The acceleration of the car is 1.30 m/s…
A beam pivoted at one end has a force of 5.0 N acting vertically upwards on it as shown. The beam is in equilibrium. …