You wish to triple the rate of energy dissipation in a heating device. To do thi

Question

You wish to triple the rate of energy dissipation in a heating device. To do this you could triple:
A. the potential di?erence keeping the resistance the same
B. the current keeping the resistance the same
C. the resistance keeping the potential di?erence the same
D. the resistance keeping the current the same
E. both the potential di?erence and current

Explanation on why D is the right answer.

Also, my book doesn't even talk about the rate of energy dissipation. So I have no idea if there is a formula for this. If there is, please note it.

Explanation / Answer

we have, E = I^2R -------equation 1 = V^2/R ----------equation - 2 a . Tripling potential difference will clearly increase heat by 9 times. (see equation 2) b. Tripling current will clearly increase heat by 9 times. (see equation 1) c. tripling resistance will decrease heat by factor of 3 ( see equation - 2) d. Tripling resistance, E = I^2 x 3R = 3I^2 R Hence D is correct answer !!!

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