Question

30 POINTS!!

The electric power used by a device with an applied voltage V and resistance R is given by

IR2 , current times resistance squared

IV, current times voltage

V2R, voltage squared times resistance

all of the above

none of the above

Answer 1

The electric power used by a device with an applied voltage V and resistance R is given by IV, current times voltage.

Step-by-step explanation:

Electric power used by a device with an applied voltage V and resistance R is given by IV, current times voltage.

Different insights can be gained from the three different expressions for electric power. For example, P = V²/R implies that the lower the resistance connected to a given voltage source, the greater the power delivered. Furthermore, since voltage is squared in P = V²/R, the effect of applying a higher voltage is perhaps greater than expected.

Therefore, the correct answer to the question is: IV, current times voltage.

Answer 2

IV, current times voltage

Step-by-step explanation:

The electric power consumed by a device can be calculated using various formulas depending on the known quantities. Here are the formula's used to calculate electric power:

`\boxed{\left\begin{array}{ccc}\text{\underline{Electric Power:}}\\\\P=IV=I^2R=(V^2)/(R)\\\\\text{Where:} \\ \text{$\bullet$ $P$ is the electric power (in watts, W)} \\ \text{$\bullet$ $I$ is the current (in amperes, A)} \\\text{$\bullet$ $V$ is the voltage (in volts, V)} \\ \text{$\bullet$ $R$ is resistance (in ohms, $\Omega$)}\end{array}\right}`

Of the options listed, the second option is the only one that shows a correct formula for electric power.