A zero to 300 V voltmeter has an error of 12% of the full-scale

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A zero to 300 V voltmeter has an error of 12% of the full-scale deflection. If the true voltage is 30V, then the range of readings on this voltmeter would be

1. 20 V to 40 V
2. 24 V to 36 V
3. 29.4 V to 30.6 V
4. 29.94 to 30.06 V

Correct Option: C

Maximum possible error that can be present on any reading

= 30 ×	2	= 0.6V
	100

Thus the voltmeter reading can be within 29.4 V to 30.6 V