Q. 83 The voltage-flux adjustment of a certain 1-phase 220 V induction watt-hour
meter is altered so that the phase angle between the applied voltage and the
flux due to it is 85c(instead of 90c). The errors introduced in the reading of
this meter when the current is 5 A at power factor of unity and 0.5 lagging are
respectively
(A) 3.8 mW, 77.4 mW
(B) -3.8 mW, -77.4 mW
(C) -4.2 W, -85.1 W
(D) 4.2 W, 85.1 W
Answer:(C)
Explanation:
