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A milliameter of resistance 5\(\Omega\) and full scale deflection of 50m A is to used...

Physics
JAMB 1980

A milliameter of resistance 5\(\Omega\) and full scale deflection of 50m A is to used to measure a potential difference of 50 V. The resistance of the multiplier should be

  • A. 95\(\Omega\)
  • B. 110\(\Omega\)
  • C. 595\(\Omega\)
  • D. 995\(\Omega\)
  • E. 1005\(\Omega\)
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Correct Answer: Option D
Explanation

V = IR

50 = 50 x 10\(^{-3}\) (5 + R)

R = 995\(\Omega\)

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