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Electric bulb 50 W - 100 V glowing at fu...

Electric bulb `50 W - 100 V` glowing at full power are to be used in parallel with battery `120 V`, `10 Omega`. Maximum number of bulbs that can be connected so that they glow in full power is

A

2

B

8

C

4

D

6

Text Solution

Verified by Experts

The correct Answer is:
C
`R =(100)^(2)/50 = 200 Omega, i=50/100=1/2A`
Main current `i=n/2 A`
`E = V+ir rArr 120 = 100 + (n/2) xx 10 rArr n = 4`
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