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...

Assessment: JAMB UTME - Physics - 1989 Subject: Physics

Question 1 Report

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

Answer Details

V = 0.1 x 50 x 10-3 = 5 x 10-3volts

RT = $\frac{0.1 \times 0.0111}{0.1 + 0.0111}$

= 9.99 x 10-3 $Ω$

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...

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