Question

Potential terminals have a __________

(a) high current capacity

(b) low voltage capacity

(c) low current capacity

(d) high voltage capacity

I have been asked this question at a job interview.

My question is based upon Shunts and Multipliers in portion Extension of Instrument Ranges of Electrical Measurements

Answer 1

Correct answer is (c) low current capacity

For explanation: A shunt is normally a very low value of resistance, connected in parallel with the ammeter coil. In a shunt, the potential terminals have a low current carrying capacity. As a result, a low range ammeter is used to measure the large current.