Name: SAT Math Help & School Math Mastery
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#34770

equations

formulas

medium

75 sec

The formula for the power $P$ dissipated by a resistor is $P = I^{2} R$ , where $I$ is the current flowing through the resistor and $R$ is its resistance. If the current $I$ is tripled and the resistance $R$ is halved, how does the power $P$ change?

A.

$P$ is multiplied by $\frac{3}{2}$ .

B.

$P$ is multiplied by $\frac{9}{2}$ .

C.

$P$ is multiplied by $3$ .

D.

$P$ is multiplied by $9$ .