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Question

In the figure given below the value of R is

A
2.5 Ω
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B
5.0 Ω
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C
7.5 Ω
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D
10.0 Ω
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Solution

The correct option is C 7.5 Ω
The Resultant (R) when viewed from voltage source

=108=12.5

R+1010=12.5Ω

R=12.51010

=12.55=7.5Ω

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