Draw the pattern of magnetic field lines due to a current-carrying solenoid. Clearly mark the north and south poles in the diagram.

An electric generator is a device that converts electrical energy into mechanical energy.

How can you show that the magnetic field produced by a given electric current in a wire decreases as the distance from the wire increases?

Commercial electric motors do not use

$(a)$ An electric current is passed in a horizontal copper wire from east to west. Explain your observations when a compass needle is placed $(i)$ below this wire,$(ii)$ above the wire. Draw inference from your observations.
$(b)$ List the factors on which the strength of the magnetic field due to a straight conductor carrying current depend. How should these be changed to decrease magnetic field at a point?

$(a)$ Which effect of the electric current is utilised in the working of an electrical fuse?
$(b)$ Is a fuse connected in series or in parallel in a household circuit?
$(c)$ Draw a schematic labelled diagram of a domestic circuit which has a provision of a main fuse,meter,one light bulb,and a switch socket.