The direction of the magnetic force acting on a current-carrying wire placed in a strong magnetic field can be determined by which rule?

Which rule is used to determine the direction of induced current in a circuit?

An electron enters a uniform magnetic field at right angles to it as shown in the figure below. In which direction will this electron move? State the rule applied by you in finding the direction of motion of the electron.

$(a)$ What is the function of an earth wire in electrical instruments? Why is it necessary to earth the metallic electric appliances?
$(b)$ Explain what is short-circuiting and overloading in an electric supply.
$(c)$ What is the usual capacity of the fuse wire in the line to feed:
$(i)$ lights and fans?
$(ii)$ appliances of $2 \,kW$ or more power?

Name three colours used and names of the wires used in household wiring.

The laws of electromagnetism tell us that energy can be transferred from one object to another: