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Question

A constant voltage is applied across a circuit. If the resistance in the circuit is doubled, what is the effect on the power dissipated by the circuit? $(a)$ The power dissipated remains constant. $(b)$ The power dissipated is doubled. $(c)$ The power dissipated is reduced by a factor of $4$. $(d)$ The power dissipated is reduced by a factor of $2$. $(e)$ The power dissipated is quadrupled.

Solution

VerifiedAnswered 9 months ago

Answered 9 months ago

Step 1

1 of 5In this problem, we have a source voltage $(V)$ rated at:

$V=110\mathrm{~V}$

And *two* different lightbulbs rated at:

$\begin{aligned} P_1&=18\mathrm{~W} \\ P_2&=12\mathrm{~W} \end{aligned}$

We want to determine which draws the **highest current $(I)$** and has the **highest resistance $(R)$**.

*What equation defines the relationship between $P,V,I,R?$*

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