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

Question

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 (A) 0.001 (B) 0.01 (C) 1 (D) 0.05

Tardigrade Admin · Accepted Answer

Voltage range of given milli voltmeter is

V = 25 mV

.
This milli voltmeter is to be converted into an ammeter of range

25 A

,
So

I = 25 A

.
If the required shunt is

R

then we can use ohm's law

V = I R

.
Hence

R = \frac{V}{I}

\Rightarrow R = \frac{25 mV}{25 A}

\Rightarrow V = \frac{25 \times 1 0 ^{- 3}}{25} = 1 0^{- 3} = 0.001 o hm

Q. 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

$0.001$

$0.01$

$1$

$0.05$

Q. 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

0.001

0.01

1

0.05

Voltage range of given milli voltmeter is V=25mV . This milli voltmeter is to be converted into an ammeter of range 25A , So I=25A . If the required shunt is R then we can use ohm's law V=IR . Hence R=IV​ ⇒R=25A25mV​ ⇒V=2525×10−3​=10−3=0.001ohm

Q. 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

$0.001$

$0.01$

$1$

$0.05$