Resistance 80699

The immersion cooker plate has data 220 V, 300 W. What is the resistance of the heating wire?

Correct answer:

R =  161.3333 Ω

Step-by-step explanation:

U=220 V P=300 W  P=UI  I=P/U=300/220=1511≐1.3636 A  I = UR  R=UI=2201.3636=161.3333 ΩU = 220 \ \text{V} \ \\ P = 300 \ \text{W} \ \\ \ \\ P = UI \ \\ \ \\ I = P/U = 300/220 = \dfrac{ 15 }{ 11 } \doteq 1.3636 \ \text{A} \ \\ \ \\ I\ = \ \dfrac{ U }{ R } \ \\ \ \\ R = \dfrac{ U }{ I } = \dfrac{ 220 }{ 1.3636 } = 161.3333 \ Ω

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