Question

What is the significance of measuring low resistances?

(a) voltage drop across the circuit is high

(b) contact and lead resistances are appreciable

(c) there is no power loss

(d) no current flows through the bridge circuit

The question was asked in an online interview.

My question comes from Measurement of Low Resistance in chapter Measurement of Resistance of Electrical Measurements

Answer 1

Right answer is (b) contact and lead resistances are appreciable

Easy explanation: When measuring low resistances of the order of 1 ῼ or even less, lead and contact resistances of the order of even 0.002 ῼ cannot be neglected. High currents flow through low resistance circuits.