When a current through a resistor is increased by a factor of 4, the power dissi

Question

When a current through a resistor is increased by a factor of 4, the power dissipated by it: a. remains unchanged b. decreases by a factor of 4 c. increases by a factor of 4 d. decreases by a factor of 16 e. increases by a factor of 16
I originally had E as my answer but just want to confirm - if this is wrong I would like to know why. When a current through a resistor is increased by a factor of 4, the power dissipated by it: a. remains unchanged b. decreases by a factor of 4 c. increases by a factor of 4 d. decreases by a factor of 16 e. increases by a factor of 16
I originally had E as my answer but just want to confirm - if this is wrong I would like to know why.

Explanation / Answer

P = RI^2  

P is directly propotional to square of current.

so

e. increases by a factor of 16

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