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#34728

equations

formulas

medium

60 sec

In physics, the power $P$ (in watts) dissipated by a resistor is related to the voltage $V$ (in volts) across it and its resistance $R$ (in ohms) by the equation $P = \frac{V ^{2}}{R}$ . Which equation correctly expresses the resistance $R$ in terms of $P$ and $V$ ?

A.

$R = P V^{2}$

B.

$R = \frac{P}{V ^{2}}$

C.

$R = \frac{V ^{2}}{P}$

D.

$R = \frac{V}{P ^{2}}$