Question
Two electric bulbs marked 25W – 220V and 100W – 220V are connected in series to a 440Vsupply. Which of the bulbs will fuse?
-
Both
-
100 W
-
25 W
-
Neither
Solution
C.
25 W
D.
Neither
Resistances of both the bulbs are
Hence, R1 >R2
When connected in series, the voltages divide in them in the ratio of their resistances. The voltage of 440 V divide in such a way that voltage across 25 w bulb will be more than 220 V. Hence 25 w bulb will fuse.
