engineering recuitment NMDC Junior Officer (Trainee) Mock Test 2024 Electrical and Electronics Measurements Error Analysis
In an ac main, the rms voltage Vac, rms current Iac and power Wac are measured as: Vac = 100 V ± 1%, Iac = 1 A ± 1% and Wac = 50 W ± 2% (errors are with respect to readings). The percentage error in calculating the power factor using these readings is
1
1%
2
2%
3
3%
4
4%