A milli voltmeter of 25 milli volt range is to be converted into an ammeter of 25 ampere range. The value (in ohm) of necessary shunt will be:

  • Option 1)

    0.001

  • Option 2)

    0.01

  • Option 3)

    1

  • Option 4)

    0.05

 

Answers (1)

As discussed in

Full scale deflection current i_{g}=\frac{25mv}{G}A

The value of shunt required for converting it into ammeter of range 25 ampere is s= \frac{i_{g}G}{i-i_{g}}\cong \frac{25mv}{25}=0.001 \Omega

 


Option 1)

0.001

This option is correct.

Option 2)

0.01

This option is incorrect.

Option 3)

1

This option is incorrect.

Option 4)

0.05

This option is incorrect.

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