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.

400mA

450mA

500mA

550mA

Correct answer is A

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

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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.

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