The resistance of an ammeter is 3 and its scale is graduated for a current upto 100A. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750A by this meter. The value of shunt resistance is

a)

b)

2

c)

0.2

d)

2K

Question ID - 151577 :-

The resistance of an ammeter is 3 and its scale is graduated for a current upto 100A. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750A by this meter. The value of shunt resistance is

a)

b)

2

c)

0.2

d)

2K

1 Answer

5876 Votes

3537

Answer Key : (b) -

(b)

Let be the current flowing through ammeter and i the total current. So, a current

will flow through shunt resistance.

Potential difference across ammeter and shunt resistance is same,

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