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In the figure given the value of X resis...

In the figure given the value of X resistance will be, when the p.d. between `B` and `D` is zero

A

4 ohm

B

6 ohm

C

8 ohm

D

9 ohm

Text Solution

Verified by Experts

The correct Answer is:
C
Balanced Wheatstone bridge
`((6 + 15))/((15 +(6)/(2))) = (((8 X)/(8 + X)+3))/((4 + (4)/(2)))`
`(21)/(18) = (((8X)/(8 + X)+3))/(6)`
`(8X)/(8 +X) = 4 rArr X = 8 Omega`.
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