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For what valve of R the net resistance o...

For what valve of `R` the net resistance of the circuit will be `18` ohms.
.

A

`8 Omega`

B

`10 Omega`

C

`16 Omega`

D

`24 Omega`

Text Solution

Verified by Experts

The correct Answer is:
A

`R_(eq) = 10 + (16 R)/(16 + R)`
`18 = 10 + (16 R)/(16 + R) rArr 8 = (16 R)/(16 + R)`
`128 + 8 R = 16 R rArr 8 R = 128`
`R = 16 Omega`.
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