Electric Power and Its Applications

watts

by multiplying the current by the difference between the voltage going into and out of the device

$P = I^2R$

<p>225 watts</p> Signup and view all the answers

<p>less than 1600 watts</p> Signup and view all the answers

<p>The relation between electric power, current, and voltage can be described by the equation: P = IV, where P is the power in watts, I is the current in amps, and V is the voltage in volts.</p> Signup and view all the answers

<p>Resistance is a property of a material that opposes the flow of electric current. It is measured in ohms (Ω).</p> Signup and view all the answers

<p>Power can be calculated using the equation: P = IV, where P is the power in watts, I is the current in amps, and V is the voltage in volts.</p> Signup and view all the answers

<p>The maximum current that can be drawn by the equipment in the home theater room is 15 amps, as indicated by the rating of the circuit breaker.</p> Signup and view all the answers

<p>Overloading the circuit breakers can cause overheating and potentially lead to electrical fires. It is important to ensure that the current drawn by the equipment does not exceed the rating of the circuit breaker to prevent such hazards.</p> Signup and view all the answers

<p>Power can be calculated by multiplying the current by itself and then multiplying the result by the resistance.</p> Signup and view all the answers

<p>The units of power are watts (W), which are equal to joules per second.</p> Signup and view all the answers

<p>When Ohm's law holds, the power can be expressed as $P = I^2 R$, where $I$ is the electric current in amperes and $R$ is the resistance in ohms.</p> Signup and view all the answers

<p>Power can be expressed as $P = V^2 / R$, where $V$ is the potential difference in volts and $R$ is the resistance in ohms.</p> Signup and view all the answers

<p>The total energy is calculated by multiplying the power by the time it is used.</p> Signup and view all the answers