A 100 V Voltmeter has an accuracy of 5% on the full scale. The percentage error while measuring 50 V will be
A 100 V Voltmeter has an accuracy of 5% on the full scale. The percentage error while measuring 50 V will be
Right Answer is:
10%
SOLUTION
Limiting error at full scale is
δE = ± 5% of 100
δE = ±5mv
Thus when the reading is 50 V, the error will still be 5 V. Hence the % limiting error
= (5/50)x100 = 10%
Note that the percentage limiting error is twice the mentioned value at full-scale reading. The limiting error increases as the reading of the voltmeter decrease.
