Kelvin’s multicellular voltmeter has torsion head & coach spring

Q.  A Kelvin’s multicellular voltmeter has a torsion head and a coach spring for
- Published on 16 Sep 15

a. Protection against accidental fraction of suspension due to vibration
b. For zero adjustment
c. Torsion head for zero adjustment and coach spring for Protection against accidental fraction of suspension due to vibration
d. Torsion head for Protection against accidental fraction of suspension due to vibration and coach spring for zero adjustment

ANSWER: Torsion head for zero adjustment and coach spring for Protection against accidental fraction of suspension due to vibration

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