Question

an electric iron consumed energy ate a rate of 500 W when the heating is at the maximum rate and voltage applied in 220 V. find the current drawn and the resistance of electric iron​

Answer 1

Answer:

Power =VI=

R

V

2

, Where V is voltage, I is current , R is resistance.

First case,

Power=880W ⇒880=220×I ⇒I=4A

⇒880=

R

220

2

⇒R=55Ω

Second Case,

Power =440W=220×I ⇒I=2A

⇒440=

R

220

2

⇒R=110Ω