Question

A voltmeter of 250 mV range having a resistance of 10 W is converted into an ammeter  of 250 mA range. The value of necessary shunt is (nearly)​

Answer 1

Given: A voltmeter of 250 mV range having a resistance of 10 W is converted into an ammeter  of 250 mA range.

To find: The value of necessary shunt ?

Solution:

• Now we have given the value of voltmeter of 250 mV.

• Resistance of 10 W.

• So shunt will be:

• S = V(g) / I - I(g)

• So here neglecting I(g), we get:

• S = V(g) / I

• S = 250 / 250 = 1 ohm

Answer:

           So the shunt will be 1 ohm.