$A$ galvanometer has a coil of resistance $100 \Omega$ showing a full scale deflection at $50 \mu A$. The resistance that should be added to use it as an ammeter of range $10 \text{ mA}$ is

  • A
    $5 \Omega$
  • B
    $5 \times 10^{-2} \Omega$
  • C
    $0.5 \Omega$
  • D
    $1 \Omega$

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