Aconstant voltage is applied across a circuit element. if the resistance of the element is doubled, what is the effect on the power dissipated by this element? the power dissipated is reduced by a factor of 2. the power dissipated remains constant. the power dissipated is doubled. the power dissipated is quadrupled. the power dissipated is reduced by a factor of 4.

The power dissipated is reduced by a factor of 2

Explanation:

The power dissipated by a resistor is given by:

where

I is the current

R is the resistance

by using Ohm's law, , we can rewrite the previous equation in terms of the voltage applied across the resistor (V):

In this problem, the resistance of the element is doubled, while the voltage is kept constant. So we have while V remains the same; substituting into the formula, we have:

so, the power dissipated is reduced by a factor 2.

i think the answer is a, hope this : )