A milliameter with full scale deflection of 10mA has an internal resistance of 5 ohms....

JAMB 1983

A milliameter with full scale deflection of 10mA has an internal resistance of 5 ohms. It would be converted to an ammeter with a full scale deflection of 1A by connecting a resistance of

A. \(\frac{5}{99}\)ohms in series with it
B. \(\frac{5}{99}\)ohms in parallel with it
C. \(\frac{99}{5}\)ohms in series with it
D. \(\frac{99}{5}\)ohms in parallel with it
E. 2 ohms in series with it

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Correct Answer: Option B

Explanation

I = 1 - (10 x 10^-3)

= 0.99A

IR = 10 x 10 x 10^-3 x 5

R = \(\frac{5}{99}\)\(\Omega\)

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A milliameter with full scale deflection of 10mA has an internal resistance of 5 ohms....

Correct Answer: Option B

Explanation

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