Homework Help: Physics

Posted by Fleur on Monday, October 22, 2012 at 4:13pm.

An electric kettle operates at 110V. What is the resistance of the kettle if the power is 1.5kW?

8.1 Ω

1.4 Ω

81 Ω

14 Ω

I'm stuck between A and B

Physics - Damon, Monday, October 22, 2012 at 4:27pm
v = i r so i = v/r
P = i v = i^2 r = v^2/r
1500 = 110^2/r
r = 8.07 Ohms

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