Hi and good day
I have got a lamp which is written that is 50W . I have connected it to my ampermeter and voltmeter and saw that the voltage is around 220V and current is 155ma . so the Lamp must be 220*0.15=33w (Am i right ?)
how much energy does this lamp consume during :
a) one second ?
b)1 hour ?
I'm working on an energy meter project using Ade7758 . I have connected this lamp to the energymeter IC and i can see the voltage and the current are like those my multimeter . then I read the active and apparent energy from the Ic . which is calculated by the ic itself . in a 0.5 second timer , i read them and I got the number 331 which shows that is related to the product of I and V. then i read the energy during one second , and i got 662 - As expected - then I read this values during an hour and the sum of these values was about 2240000 -as expected again-
But I cant understand the relation between these values and the real consumed energy .
please kindly help me to understand what I must do