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.

Question

Physics

Camilla Wagner

15 July, 14:16

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.

+1

Answers (1)

Know the Answer?

Amiga · Answer 1

b. 25W

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.

Two electric bulbs marked (25 W - 220 V and (100 W - 220 V are connected in series toa 440 V supply which of the bulbs will fuse ...a. 100 W.6.25 Wc. None of this. d. Both.

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.