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Which of the following material will be preferred as a shunt for extending the range of measurement of a voltmeter?

  • Manganin is preferred as a shunt for extending the range of measurement of a voltmeter.
  • Manganin is a type of resistance wire that is often used as a shunt for extending the range of measurement of a voltmeter.
  • Manganin has a very low-temperature coefficient of resistance, which means that its resistance does not change significantly with temperature.
  • This makes it an ideal material for shunts, as it ensures that the shunt's resistance remains stable over a wide temperature range.
  • When a shunt is connected in parallel with a voltmeter, it diverts a known fraction of the current around the voltmeter, allowing the voltmeter to measure the remaining voltage drop across the load.
  • The shunt's resistance is carefully chosen so that the voltage drop across it is proportional to the current flowing through it, which allows the current to be accurately calculated from the voltmeter reading.
  • "Manganin is preferred as a shunt for extending the range of measurement of a voltmeter, due to its low-temperature coefficient of resistance and stability over a wide temperature range."