1.

An electric iron has a rating of 1000w 220v calculate the current resistance

Answer»

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.



Discussion

No Comment Found

Related InterviewSolutions