electric iron has rating of 750 w to 220 volt calculate current passing through it ,
its resistance when in use
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electric iron has rating of 750 w to 220 volt calculate current passing through it ,
its resistance when in use
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Generally single phase power formula is P=VI
P stands for power of equipment , V stands for operating Voltage and I stands for flow of current in circuit.
In this case P = 750 watt and V =220 Volt
So I=P/V
750/220 = 3.40Amp.
In iron flow of current is 3.40 Amp.
Now according to ohm's law I is directly proportional to voltage if resistance and temp. Is constant . so V= IR
R stands for resistance of material.
So for finding R
R=V/I , 220/3.40
R= 64.60 ohm.
Therefore, I = P / V
I = 750/220
= 75/22
Again, R = V/I
= 220 * 22 / 75
= 44 * 22 / 15
= 968/15
= 64.533333333