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In the given circuit, find the value of ...

In the given circuit, find the value of R :
.

A

`20 Omega`

B

`25 Omega`

C

`15 Omega`

D

`10 Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
b. Current in `EC = 40/20 = 2A`
Current at C `= 2+2 = 4A`
Equivalent resistance of CD `= (5 xx 5)/10 = 2.5 Omega`
Potential drop in `CD = 4 xx 2.5 = 10V`
`100 - V_(EC) + V_(CD) + V_(DF)`
`Current in wire `DG = 2A`
Current in resistance `DF = 2A`
`R xx 2 = 50 or R = 25 Omega` .
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