An ammeter of resistance 1.0(Omega) has a full-scale deflection of 50mA. Determine the resultant full-scale…

An ammeter of resistance 1.0(Omega) has a full-scale deflection of 50mA. Determine the resultant full-scale deflection of the meter when a shunt of 0.0111(Omega) is connected across its terminals.

Correct Answer: Option A

Explanation

V = 0.1 x 50 x 10^-3 = 5 x 10^-3volts
R_T = (frac{0.1 times 0.0111}{0.1 + 0.0111})
= 9.99 x 10^-3(Omega)
V = IR (Rightarrow) I
= (frac{5 times 10^{-3}}{9.9 times 10^{-3}})
= 0.5A ; = 500mA