Which of the following is true for extending the range of the DC voltmeter? 

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MPPGCL JE Electrical 28 April 2023 Shift 1 Official Paper
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  1. A large resistance is connected in series with a meter. 
  2. A small resistance is connected in parallel with a meter.
  3. A small resistance is connected in series with a meter. 
  4. A large resistance is connected in parallel with a meter.

Answer (Detailed Solution Below)

Option 1 : A large resistance is connected in series with a meter. 
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Detailed Solution

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Extension of moving iron voltmeter

The range of a moving iron voltmeter can be extended by using a high value of multiplier resistance connected in series with a voltmeter.

Additional Information

Extension of moving iron ammeter 

The range of a moving iron ammeter can be extended by using a low value of shunt resistance connected in parallel with an ammeter.

 

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