Two bulbs of 500W and 300W are manufactured to operate on a 220V line.If their resis tance are `R_(1)` and `R_(2)` respectively then value of `R_(1)/R_(2)` is

Two bulbs of 500 watt and 200 watt are manufactured to operate on 220 volt line. The ratio of heat produced in 500 W and 200 W , in two cases, when firstly they are joined in parallel and secondly in series, will be

Two bulbs of 500 watt and 200 watt are manufactured to operate on 220 volt line. The ratio of heat produced in 500 W and 200 W , in two cases, when firstly they are joined in parallel and secondly in series, will be

Two electric bulbs , rated for the same voltage , have powers of 200 W and 100 W , respectively. If their resistances are r_(1) and r_(2) , respectively , then

Two electric bulbs , rated for the same voltage , have powers of 200 W and 100 W , respectively. If their resistances are r_(1) and r_(2) , respectively , then

Two electric bulbs , rated at (25W,220V) and (100W,220V), are connected in series across a 220 V voltage source , if the 25W and 100W bulbs draw powers P_(1) and P_(2) Respectively , then :

Two electric bulbs , rated at (25W,220V) and (100W,220V), are connected in series across a 220 V voltage source , if the 25W and 100W bulbs draw powers P_(1) and P_(2) Respectively , then :

A filament bulb (500W, 100V) is to he used in a 230 V main supply. When a resistance R connected in series, it works perfectly and the bulb consumes 500W. The value of R is

Two bulbs are marked 220V - 100 W and 110 V- 100W. The ratio of the resistances of the two bulbs is

Two electric bulbs marked 500W,220V are put in series with 110V line.The power dissipated by the bulbs is "

A filament bulb (500W, 100V)is to be used in a 230v main supply. When a resistance R is connected in series, it works perfectly and the bulb consumes 500W. The value of R is