+1 vote

P=VICos ¥

where cos ¥is p.f

how it is measured in wattmeter? 

asked Jun 18, 2019 in Electrical by kishorelohra | 40 views

1 Answer

+1 vote

In wattmeter when the cc and pc measure current and voltage "it does not measure the magnitude of current and voltage but the instantaneous value of current and voltage." This means that when u are multuplying the instantaneous values the pf term becomes inclusive. 

answered Jun 18, 2019 by d_shruti007