What is the process of depositing a layer of gold on silver called?

Which device works on the heating effect of electric current?

An electric bulb should be connected to how much voltage line if it draws an electric current of $0.5\, A$,the resistance of the filament of that bulb being $440\, \Omega$ (in $, V$)?

State a difference between the wire used in the element of an electric heater and in a fuse wire.

Three $V-I$ graphs are drawn individually for two resistors and their series combination. Out of $A, B, C$,which one represents the graph for the series combination of the other two? Give a reason for your answer.

An electric heater rated $600 \ W$ operates $6$ hours per day. Find the cost to operate it for $30$ days at ₹ $3.00$ per unit.