Test Academy | A balanced Wheatstone bridge ABCD has the following arm resistances :R AB =1 kΩ ±2.1%; R BC =100 Ω±0.5%;=RCD is an unknown resistance; R DA = 300 Ω±0.4%. The value of R CD and its accuracy is 300 Ω±90Ω, 3000 Ω±3Ω, 30Ω±0.9Ω, 30 Ω±3Ω

Question

A balanced Wheatstone bridge ABCD has the following arm resistances :R_AB=1 kΩ ±2.1%; R_BC=100 Ω±0.5%;=RCD is an unknown resistance; R_DA = 300 Ω±0.4%. The value of R_CDand its accuracy is

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