A standard 40W tubelight is in parallel with a room heater both connected to a suitable supply line. What will happen when the light is switched of:

A standard 50W electirc bulb in series with a room heater is connected across the mains. If the 50W bulb is replaced by 100W bulb the heater output will

A standard 50W electirc bulb in series with a room heater is connected across the mains. If the 50W bulb is replaced by 100W bulb the heater output will

A 50 W bulb is connected in parallel with a room heater, is connected across that mains. If 50 W bulb is now replaced by 150 W bulb in each of the two cases, will the heat produced by heater by smaller, remain the same or be larger?

A spring is suspended as shown in diagram. A battery and switch are connected between the ends of the spring. What happens when the switch is closed ? Guess the answer .

Two heaters are marked 200 V, 300 W. 300 V, 600 W. If the heaters are combined in series and the combination connected to a 200 V.d.c. supply, which heater will produce more heat ? What is the power output of the combination ?

The maximum number of 40 W tube-lights connected in parallel which can safely be run from a 240 V supply with a 5 A fuse is :

A bulb of 484 Omega is producing light when connected to 200 V supply. What is the electric power of the bulb?

An electric room heater draws a current of 2.4A from the 120V supply line. What current will his room heater draw when connected to 240V supply line?