WHAT IS THE MEANING OF 'UPF'&'LPF'.... HOW CAN WE DEFINE IT?
WHAT IS THE VALUE/RANGE OF EARTH WIRE RESISTANCE USED
PARTICULARLY IN HOME....
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Answer Posted / dilse
unity powerfactor:when voltage and current are in same
phase i.e displaced by zero degrees simply cos(phy)=1;
where phy is the phase angle b\w voltage and current
low power factor: when current lags behind voltate by angle
phy,usally cos(phy)=0.1 to 0.4 corresponds to low power
factor
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