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For the ac bridge circuit shown in the figure at balance, the value of Rd, Ld and Qd will be respectively
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Ra Rb; RaRc ;ωCbRb Rc Cb -
Rb Rc; RaRc ;ωCbRb Ra Cb -
Rb Rc;RaRcCb;ωCbRc Ra -
Ra Rc;RaRcCb;ωCbRb Rb
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Correct Option: D
From balance condition
RaRc = (RdjωLd | |
1 + lωcbRb |
or (1 + ωcbRb)RaRc = Rb(Rd + jωLd
or RbRd = RaRc
∴ Rd = | |
Rb |
and ωCbRbRc = ωRbLd
or Ld = RaRcCb