List of top Science Questions on Electrical Circuits

The minimum number of identical bulbs of rating 4V, 6W, that can work safely with desired brightness, when connected in series with a 240V mains supply is:
State the role of an electric fuse, used in series with an electrical appliance. Why should in an electric circuit a fuse with defined rating not be replaced by one with a larger rating?
An electric bulb is rated 220V, 11W. The resistance of its filament when it glows with a power supply of 220V is: