an electric iron has a rating of 750 W , 220V,calculate 1) current passing through it and 2) its resistance ,when in use.
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1)P=VI
⇒I= P/V
⇒I = 750/220
→I = 3.4 A←
2)V = IR
⇒R = V/I
⇒R = 220/3.4
→ R= 64.7 Ω←
⇒I= P/V
⇒I = 750/220
→I = 3.4 A←
2)V = IR
⇒R = V/I
⇒R = 220/3.4
→ R= 64.7 Ω←
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