What is the effect of the ammeter range on the shunt resistance?(a) no effect(b) varies by a factor of multiplying factor(c) varies by a factor of the resistance(d) varies by a factor of unityThe question was asked in a job interview.My question is from Shunts and Multipliers in division Extension of Instrument Ranges of Electrical Measurements

What is the effect of the ammeter range on the shunt resistance?(a) no

1.	What is the effect of the ammeter range on the shunt resistance?(a) no effect(b) varies by a factor of multiplying factor(c) varies by a factor of the resistance(d) varies by a factor of unityThe question was asked in a job interview.My question is from Shunts and Multipliers in division Extension of Instrument Ranges of Electrical Measurements
Answer» RIGHT choice is (B) varies by a FACTOR of multiplying factor Easy explanation: We know that N = 1 + ^Ra⁄Rs where, N is the multiplying factor Ra is the ammeter resistance Rs is the shunt resistance It is CLEAR from the above equation that in order to increase the ammeter range by N times, the shunt resistance is EQUIVALENT to ^1⁄N-1.

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