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Q.

Resistance of an ammeter is 4 Ω and its range is 0 to 2 A. What shunt resistance should be used to increase its range from 0 to 8 A?

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a

0.75 Ω

b

1.82 Ω

c

1.33 Ω

d

2 Ω

answer is C.

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Detailed Solution

Rsh×(8−2)=4×2⇒Rsh=1.33 Ω
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