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A balanced Wheatstone's network is shown...

A balanced Wheatstone's network is shown in the figure. If the balance is disturbed by changing P to `15 Omega`, then which one of the following steps will not bring the bridge to balance again ?

A

increase R by `10 Omega`

B

increase S by `20 Omega`

C

increase Q by `50 Omega`

D

make `RQ=3000 Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
The condition PS=QR is satisfied in (a), (c ) and (d)
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