A voltmeter of resistance `1000 Omega` gives full scale deflection when a current of `100 mA` flow through it. The shunt resistance required across it to enable it to be used as an ammeter reading `1 A` at full scale deflection is

Options

A. `10000 Omega`
B. `9000 Omega`
C. `222 Omega`
D. `111 Omega`

Answer

D

Explanation

(d) By using `(i)/(i_(g)) = 1 + (G)/(S)`
`implies (i)/(100 xx 10^(_3)) = 1 + (1000)/(S) implies = (1000)/(9) = 111 Omega`