What is the resistance of a heating element when the current through it is 1.20 A and it is consuming electrical energy at a rate of 240 W?

R=166.67Ω

Explanation:

Power is the rate of doing work and its unit is Watt.

P = IV ........................equation 1

voltage is the product of current and resistance.

V=IR

substitute V=IR into equation 1

Power = I*IR

power =I²R

divide power by I square to get R

R=

power =240W ,  I=1.2A  

R=  240/ 1.2²

R =240/1.44

R=166.67Ω

electrical power

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