Q. A 0-1 Ampere moving iron ammeter has an internal resistance of 50 mΩ and inductance of 0.1 mH. A shunt coil is connected to extend its range to 0-10 Ampere for all operating frequencies. The time constant in milliseconds and resistance in mΩ of the shunt coil respectively are
(A) 2, 5.55 (B) 2, 1 (C) 2.18, 0.55 (D) 11.1, 2
Ans: 2, 5.55
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