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An ammeter reads upto 1A. Its internal resistance is 0.81 . To increase the range to 10A the value of the required shunt is

a)

0.03

b)

0.3

c)

0.9

d)

0.09


Question ID - 151377 | Toppr Answer

An ammeter reads upto 1A. Its internal resistance is 0.81 . To increase the range to 10A the value of the required shunt is

a)

0.03

b)

0.3

c)

0.9

d)

0.09

1 Answer - 5876 Votes

3537

Answer Key : (d) -

(d)

To increase the range of ammeter we have to connect a small resistance in parallel

(shunt), let its value be R.     

Apply KCL at junction to divide the current.

Voltage across R= Voltage across ammeter



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