B: coil of wire
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A current-carrying wire is placed between the poles of a magnet. What is the direction of the force on the wire due t…
A simple d.c. motor consists of a coil that rotates between the poles of a permanent magnet. The turning effect is in…
A current is produced when a wire is moved between two magnets as shown. Which device uses this effect?
A brick of weight 80 N stands upright on the ground as shown. What is the pressure it exerts on the ground?
An airtight container holds a fixed mass of gas. Its pressure and volume are measured on four occasions when the temp…
Energy is released in some power stations and in the Sun by either nuclear fission or nuclear fusion. Which type of n…