A 70 W electric blanket runs at 18 V What is the resistance

A 70 W electric blanket runs at 18 V. What is the resistance of the wire in the blanket? Express your answer to two significant figures and include the appropriate units. R=2.4 ohms How much current does the wire carry? Express your answer to two significant figures and include the appropriate units. I=5 amps

Solution

Given,

P = 70 W

V = 18v

A)

Resistance(R) = (V)^2 / P = (18)^2 / 70 = 4.629 ohms

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B)

Current(I) = P / V = 70 / 18 = 3.889 A