30 cm.
120 cm.
90 cm.
60 cm.
The dynamo converts
The earth is a
The earth-wire of a cable is attached to
The earth-wire of a cable is connected to
The earth’s magnetic field always has a vertical component except at the
The earthing transformer is used
The efficiency of a transformer is usually of the order of
The ejection of electrons when a metal surface is irradiated is called
The electric current in a metal wire is due to the flow of -
The electric motor converts
