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GATE 2015 EE - SET 1 - Question 5

R1 = 50 Ω

R2 = 65 Ω

R3 = tolerance ± 5 %  ,

Then R3 = 95 ⇒ 105

when bridge is balanced R1 Rx = R2 R3

When R3 = 95 ⇒ Rx = 65 x 95

Rx = 65 x 95 /50 = 123.5 Ω

When R3 = 105 ⇒ 50 ,Rx = 65 x 105

Rx = 65 x 105 /50 = 136.5 Ω

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