Why Kelvin bridge is used for measurement of low resistance?(a) due to e.m.f source used(b) due to a large current flow(c) due to contact and lead resistance(d) due to power dissipation across the circuitI got this question in a job interview.This is a very interesting question from Kelvin Bridge topic in section Measurement of Resistance of Electrical Measurements

Why Kelvin bridge is used for measurement of low resistance?(a) due to

1.	Why Kelvin bridge is used for measurement of low resistance?(a) due to e.m.f source used(b) due to a large current flow(c) due to contact and lead resistance(d) due to power dissipation across the circuitI got this question in a job interview.This is a very interesting question from Kelvin Bridge topic in section Measurement of Resistance of Electrical Measurements
Answer» Correct answer is (c) due to contact and lead resistance Explanation: While measuring very LOW resistances the contact and lead resistances cause SIGNIFICANT errors in the VALUE of the measured resistance. As a result Kelvin bridge is used for measurement of low resistances.

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