A galvanometer of resistance 20\(\Omega\) is to be provided with a shunt that \(\frac{1}{10}\) of…

Physics JAMB 1987

A galvanometer of resistance 20\(\Omega\) is to be provided with a shunt that \(\frac{1}{10}\) of the whole current in a circuit passes through the galvanometer. The resistance of the shunt is

  • 2.00\(\Omega\)
  • 2.22\(\Omega\) checkmark
  • 18.00\(\Omega\)
  • 18.22\(\Omega\)

The correct answer is: B

Explanation

\(\frac{1}{10}\)I x 20 = \(\frac{9}{10}\)I x Rs

Rs = 2.22\(\Omega\)
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