Question

A milliammeter of range `10 mA` and resistance `9 Omega` is joined in a circuit as shown. The metre gives full-scale deflection for curretn `I` when `A` and `B` are used as its terminals, i.e., current enters at `A` and leaves at `B` (`C` is left isolated). The value if `I` is

A. `100 mA`
B. `900 mA`
C. `1A`
D. `1.1 A`

Answer 1

Correct Answer - C
`10xx10^(-3)=0.1/((9.9+0.1))xxI`
`I=1` Amp.