SSC JE Electrical Engineering 2014 Set 1 Paper

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Question : 111 of 200

Marks: +1, -0

In the figure, the value of R is

2.5 Ω
5.0 Ω
7.5 Ω
10.0 Ω

Solution:

Now

I =100/({R+5})=8A

8=100/{R+5}

∴

8R + 40 = 100

∴

8R = 60

∴

R =60/8

R = 7.5 Ω

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