Question

Two electric 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 .........
a. 100 W.
6.25 W
c. None of this. d. Both.
​

Answer 1

b. 25W

Step-by-step explanation:

The 25W bulb has 4 times the resistance of the 100W bulb, so 4/5 of the circuit voltage will develop across that bulb. The 352 volts applied will far exceed the rating of the 25W bulb, causing it to fail.