Q136 / 150 · MHT CET 2011 · Physics

A voltmeter of range $3 \mathrm{~V}$ and resistance $200 \Omega$ cannot be converted to an ammeter of range

  • A
    $10 \mathrm{~mA}$
  • Correct answer
    B
    $100 \mathrm{~mA}$
  • C
    $1 \mathrm{~A}$
  • D
    $10 \mathrm{~A}$

Solution

$I_{g}=\frac{3 \mathrm{~V}}{200 \Omega}=0.015 \mathrm{~A}$ So, new range cannot be less than $15 \mathrm{~mA}$.

Hence, the correct answer is option: 'B'.

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