Bulb rated 200W, 100V. Find R connected in series to bulb in a circuit with 200V so that bulb delivers same power.

An electric bulb with rating 200 W, 50V is connected to a source of 120 V. A resistance R is connected in series to the bulb, so that the bulb delivers 200W . Calculate the value of R.

A room heater is rated 500 W, 220V . (a) Find the resistance of its coil. (b) If the supply voltage drops to 200 V , what will be the power consumed? ( c) If an electric bulb rated 100 W, 220 V is connected in series with this heater, what will be the power consumed by the heater and by the bulb when the supply is at 220 V ?

If a bulb rated as (25W-220V) is connected in series to another bulb rated as (100W-220v) to 220 volt, then which bulb will give more illumination.

Two electric bulbs marked 25W-220V and 100W-220V are connected in series to a 440 V supply. Which of the bulbs will fuse ?

When three identical bulbs of 60 W, 200 V rating are connected in series to a 200 V supply, the power drawn by them will be

Tow electric bulb A and B rated 200 V - 100 W and 200 V ~ 60W are connected in series to a 200 V line . Then the potenital drop across .

Ten 60W,220V bulbs are connected in series to 220V supply.Power consumed in the circuit is

An electric bulb rated as 200 W at 100 V is used in a circuit having 200 V supply. The resistance 'R' that must be put in series with the bulb so that the bulb delivers the same power is __________ Omega .

Two electic bulbs marked 25 W -220 V and 100 W - 220 V are connected in series to a 440 V supply. Which of the bulbs will fuse?