Which is not a source of error in the measurement of low resistance?(a) contact resistance drops at the leads(b) thermal e.m.f(c) temperature effect(d) power dissipation through the circuitI got this question during an interview for a job.This is a very interesting question from Measurement of Low Resistance in section Measurement of Resistance of Electrical Measurements

Which is not a source of error in the measurement of low resistance?(a

1.	Which is not a source of error in the measurement of low resistance?(a) contact resistance drops at the leads(b) thermal e.m.f(c) temperature effect(d) power dissipation through the circuitI got this question during an interview for a job.This is a very interesting question from Measurement of Low Resistance in section Measurement of Resistance of Electrical Measurements
Answer» Correct answer is (a) CONTACT resistance drops at the leads To explain I WOULD say: As the current FLOWING through a LOW resistance CIRCUIT is low, the voltage drop across the terminals due to contact and lead resistances is negligible. Thermal e.m.f occurs in a circuit when its temperature increases due to high current flow.

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