How should the electric lamps in a building be connected so that the switching on and off in a room has no effect on other lamps in the same building ?
How should the several electric lamps be connected with the mains so that the switching on or off a lamp has no effect on the operation of other lamps?
Several electric bulbs designed to be used on a 220 V electric supply line, are rated 10 W. How many lamps can be connected in parallel with each other across the two wires of 220 V line if the maximum allowable current is 5 A?