In a filament type light bulb, most of the electric power consumed appears as :

The heat produced in a wire of resistance ‘x’ when a current ‘y’ flows through it in time ‘z’ is given by :

Which of the following characteristic is not suitable for a fuse wire?

Which of the following is the most likely temperature of the filament of an electric light bulb when it is working on the normal 220 V supply line?

If the current flowing through a fixed resistor is halved, the heat produced in it will become: