Two devices of ratings 44W, 200V and 11W, 220V are connected in series. The combination is connected across a 440V mains. The fuse of which of the two devices is likely to burn when switch is on ? Justify your ,answer.

Two devices of ratings 44W, 200V and 11W, 220V are connected in series

1.	Two devices of ratings 44W, 200V and 11W, 220V are connected in series. The combination is connected across a 440V mains. The fuse of which of the two devices is likely to burn when switch is on ? Justify your ,answer.
Answer» Solution :The fuse of device of ra.ting 11W, 220 V will burn. `R=(V^(2))/(W) :.` RESISTANCE of 11 W device will be FOUR times than that of the device of 44W. `:.` Voltage across 11 W= 352 V `:.` Volatge across 44W= 88 V 352 V across the device of 11W, 220V rating is sufficient to BUM the fuse of the device.