engineering recuitment HPCL Junior Executive 2025 Mock Test Electrical and Electronics Measurements Measurement of Power Measurement of AC Power
The current coil of a 200 V, 5 A, electrodynamometer type LPF wattmeter carries a current of \(\sqrt 2 {\rm{cos}}\left( {100\pi t} \right)\) A. The voltage across the pressure coil is \(\sqrt 2 {\rm{sin}}\left( {100\pi t} \right)\) V. The meter will indicate
1
0 W
2
100 W
3
200 W
4
400 W