Question

21. What will be the value of shunt resistance that must be connected
across a galvanometer of 50.0 l resistance which gives full scale
deflection with 2.0 mA current, so as to convert it into an ammeter
of range 10.0 A?
A. 5.07 ohm
B. 4.09 ohm
C. 3.05 ohm
D. 0.01 ohm
E. 2.07 ohm​

Answer 1

Answer:

A: The voltage across the meter is I x R = 2/1000 x 50 = 0.1 volt.

To obtain full scale with 10 amps implies a total resistance of

R = E/I = 0.1 /10 = 0.01 ohms

The shunt resistor in parallel with the meter movement ought to provide 0.01 ohms. In practice, the shunt itself would be 0.01 ohms using commercial accuracy requirement.

Explanation:

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