Electric Power - AP Physics C: Electricity and Magnetism
Card 1 of 30
Which formula expresses power in terms of energy used and time?
Which formula expresses power in terms of energy used and time?
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$P = \frac{E}{t}$. Fundamental definition of power as energy rate.
$P = \frac{E}{t}$. Fundamental definition of power as energy rate.
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Calculate the power when $150 \text{ V}$ is applied across $50 \text{ }\text{Ω}$.
Calculate the power when $150 \text{ V}$ is applied across $50 \text{ }\text{Ω}$.
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$450 \text{ W}$. Using $P = \frac{V^2}{R} = \frac{150^2}{50} = 450$ W.
$450 \text{ W}$. Using $P = \frac{V^2}{R} = \frac{150^2}{50} = 450$ W.
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Determine the power if $300 \text{ J}$ is used in $15 \text{ s}$.
Determine the power if $300 \text{ J}$ is used in $15 \text{ s}$.
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$20 \text{ W}$. Using $P = \frac{E}{t} = \frac{300}{15} = 20$ W.
$20 \text{ W}$. Using $P = \frac{E}{t} = \frac{300}{15} = 20$ W.
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What is the power dissipated in a $30 \text{ }\text{Ω}$ resistor with $6 \text{ A}$?
What is the power dissipated in a $30 \text{ }\text{Ω}$ resistor with $6 \text{ A}$?
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$1080 \text{ W}$. Using $P = I^2R = 6^2 \times 30 = 1080$ W.
$1080 \text{ W}$. Using $P = I^2R = 6^2 \times 30 = 1080$ W.
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Calculate the power dissipated in a $25 \text{ }\text{Ω}$ resistor with $5 \text{ A}$.
Calculate the power dissipated in a $25 \text{ }\text{Ω}$ resistor with $5 \text{ A}$.
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$625 \text{ W}$. Using $P = I^2R = 5^2 \times 25 = 625$ W.
$625 \text{ W}$. Using $P = I^2R = 5^2 \times 25 = 625$ W.
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What is the power if $12 \text{ V}$ is applied across a $3 \text{ }\text{Ω}$ resistor?
What is the power if $12 \text{ V}$ is applied across a $3 \text{ }\text{Ω}$ resistor?
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$48 \text{ W}$. Using $P = \frac{V^2}{R} = \frac{12^2}{3} = 48$ W.
$48 \text{ W}$. Using $P = \frac{V^2}{R} = \frac{12^2}{3} = 48$ W.
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What is the power dissipated in a $10 \text{ }\text{Ω}$ resistor with $2 \text{ A}$ current?
What is the power dissipated in a $10 \text{ }\text{Ω}$ resistor with $2 \text{ A}$ current?
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$40 \text{ W}$. Using $P = I^2R = 2^2 \times 10 = 40$ W.
$40 \text{ W}$. Using $P = I^2R = 2^2 \times 10 = 40$ W.
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What is the power dissipated in a $50 \text{ }\text{Ω}$ resistor with $3 \text{ A}$?
What is the power dissipated in a $50 \text{ }\text{Ω}$ resistor with $3 \text{ A}$?
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$450 \text{ W}$. Using $P = I^2R = 3^2 \times 50 = 450$ W.
$450 \text{ W}$. Using $P = I^2R = 3^2 \times 50 = 450$ W.
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What is the power dissipated in a circuit with $6 \text{ V}$ and $3 \text{ A}$?
What is the power dissipated in a circuit with $6 \text{ V}$ and $3 \text{ A}$?
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$18 \text{ W}$. Using $P = IV = 6 \times 3 = 18$ W.
$18 \text{ W}$. Using $P = IV = 6 \times 3 = 18$ W.
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Calculate the power dissipated in a $20 \text{ }\text{Ω}$ resistor with $4 \text{ A}$.
Calculate the power dissipated in a $20 \text{ }\text{Ω}$ resistor with $4 \text{ A}$.
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$320 \text{ W}$. Using $P = I^2R = 4^2 \times 20 = 320$ W.
$320 \text{ W}$. Using $P = I^2R = 4^2 \times 20 = 320$ W.
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What is the power if $15 \text{ V}$ is applied across a $5 \text{ }\text{Ω}$ resistor?
What is the power if $15 \text{ V}$ is applied across a $5 \text{ }\text{Ω}$ resistor?
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$45 \text{ W}$. Using $P = \frac{V^2}{R} = \frac{15^2}{5} = 45$ W.
$45 \text{ W}$. Using $P = \frac{V^2}{R} = \frac{15^2}{5} = 45$ W.
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Determine the power if $500 \text{ J}$ is used in $10 \text{ s}$.
Determine the power if $500 \text{ J}$ is used in $10 \text{ s}$.
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$50 \text{ W}$. Using $P = \frac{E}{t} = \frac{500}{10} = 50$ W.
$50 \text{ W}$. Using $P = \frac{E}{t} = \frac{500}{10} = 50$ W.
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Which formula expresses power in terms of energy used and time?
Which formula expresses power in terms of energy used and time?
Tap to reveal answer
$P = \frac{E}{t}$. Fundamental definition of power as energy rate.
$P = \frac{E}{t}$. Fundamental definition of power as energy rate.
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What is the power dissipated if a device uses $240 \text{ J}$ in $2 \text{ s}$?
What is the power dissipated if a device uses $240 \text{ J}$ in $2 \text{ s}$?
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$120 \text{ W}$. Using $P = \frac{E}{t} = \frac{240}{2} = 120$ W.
$120 \text{ W}$. Using $P = \frac{E}{t} = \frac{240}{2} = 120$ W.
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What is the power if $120 \text{ V}$ is applied across $30 \text{ }\text{Ω}$ resistor?
What is the power if $120 \text{ V}$ is applied across $30 \text{ }\text{Ω}$ resistor?
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$480 \text{ W}$. Using $P = \frac{V^2}{R} = \frac{120^2}{30} = 480$ W.
$480 \text{ W}$. Using $P = \frac{V^2}{R} = \frac{120^2}{30} = 480$ W.
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What is the power dissipated in a resistor with $5 \text{ A}$ current and $10 \text{ V}$ voltage?
What is the power dissipated in a resistor with $5 \text{ A}$ current and $10 \text{ V}$ voltage?
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$50 \text{ W}$. Using $P = IV = 5 \times 10 = 50$ W.
$50 \text{ W}$. Using $P = IV = 5 \times 10 = 50$ W.
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State the formula for power in a resistive circuit using voltage and resistance.
State the formula for power in a resistive circuit using voltage and resistance.
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$P = \frac{V^2}{R}$. Derived from $P = IV$ and Ohm's law $I = \frac{V}{R}$.
$P = \frac{V^2}{R}$. Derived from $P = IV$ and Ohm's law $I = \frac{V}{R}$.
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Identify the power dissipated if $250 \text{ J}$ is used in $5 \text{ s}$.
Identify the power dissipated if $250 \text{ J}$ is used in $5 \text{ s}$.
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$50 \text{ W}$. Using $P = \frac{E}{t} = \frac{250}{5} = 50$ W.
$50 \text{ W}$. Using $P = \frac{E}{t} = \frac{250}{5} = 50$ W.
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Calculate the power used when $100 \text{ V}$ is applied across $25 \text{ }\text{Ω}$.
Calculate the power used when $100 \text{ V}$ is applied across $25 \text{ }\text{Ω}$.
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$400 \text{ W}$. Using $P = \frac{V^2}{R} = \frac{100^2}{25} = 400$ W.
$400 \text{ W}$. Using $P = \frac{V^2}{R} = \frac{100^2}{25} = 400$ W.
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What is the power dissipated in a $40 \text{ }\text{Ω}$ resistor with $2 \text{ A}$?
What is the power dissipated in a $40 \text{ }\text{Ω}$ resistor with $2 \text{ A}$?
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$160 \text{ W}$. Using $P = I^2R = 2^2 \times 40 = 160$ W.
$160 \text{ W}$. Using $P = I^2R = 2^2 \times 40 = 160$ W.
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Determine the power dissipated when $400 \text{ J}$ is used in $5 \text{ s}$.
Determine the power dissipated when $400 \text{ J}$ is used in $5 \text{ s}$.
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$80 \text{ W}$. Using $P = \frac{E}{t} = \frac{400}{5} = 80$ W.
$80 \text{ W}$. Using $P = \frac{E}{t} = \frac{400}{5} = 80$ W.
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What is the power dissipated in a $50 \text{ }\text{Ω}$ resistor with $3 \text{ A}$?
What is the power dissipated in a $50 \text{ }\text{Ω}$ resistor with $3 \text{ A}$?
Tap to reveal answer
$450 \text{ W}$. Using $P = I^2R = 3^2 \times 50 = 450$ W.
$450 \text{ W}$. Using $P = I^2R = 3^2 \times 50 = 450$ W.
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What is the power dissipated in a $30 \text{ }\text{Ω}$ resistor with $6 \text{ A}$?
What is the power dissipated in a $30 \text{ }\text{Ω}$ resistor with $6 \text{ A}$?
Tap to reveal answer
$1080 \text{ W}$. Using $P = I^2R = 6^2 \times 30 = 1080$ W.
$1080 \text{ W}$. Using $P = I^2R = 6^2 \times 30 = 1080$ W.
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Determine the power if $500 \text{ J}$ is used in $10 \text{ s}$.
Determine the power if $500 \text{ J}$ is used in $10 \text{ s}$.
Tap to reveal answer
$50 \text{ W}$. Using $P = \frac{E}{t} = \frac{500}{10} = 50$ W.
$50 \text{ W}$. Using $P = \frac{E}{t} = \frac{500}{10} = 50$ W.
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What is the power if $15 \text{ V}$ is applied across a $5 \text{ }\text{Ω}$ resistor?
What is the power if $15 \text{ V}$ is applied across a $5 \text{ }\text{Ω}$ resistor?
Tap to reveal answer
$45 \text{ W}$. Using $P = \frac{V^2}{R} = \frac{15^2}{5} = 45$ W.
$45 \text{ W}$. Using $P = \frac{V^2}{R} = \frac{15^2}{5} = 45$ W.
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Calculate the power dissipated in a $20 \text{ }\text{Ω}$ resistor with $4 \text{ A}$.
Calculate the power dissipated in a $20 \text{ }\text{Ω}$ resistor with $4 \text{ A}$.
Tap to reveal answer
$320 \text{ W}$. Using $P = I^2R = 4^2 \times 20 = 320$ W.
$320 \text{ W}$. Using $P = I^2R = 4^2 \times 20 = 320$ W.
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What is the power dissipated in a circuit with $6 \text{ V}$ and $3 \text{ A}$?
What is the power dissipated in a circuit with $6 \text{ V}$ and $3 \text{ A}$?
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$18 \text{ W}$. Using $P = IV = 6 \times 3 = 18$ W.
$18 \text{ W}$. Using $P = IV = 6 \times 3 = 18$ W.
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Which quantity measures the rate at which electrical energy is converted to another form?
Which quantity measures the rate at which electrical energy is converted to another form?
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Electric power. Rate of energy conversion from electrical to other forms.
Electric power. Rate of energy conversion from electrical to other forms.
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Calculate the power dissipated if $20 \text{ J}$ of energy is used in $4 \text{ s}$.
Calculate the power dissipated if $20 \text{ J}$ of energy is used in $4 \text{ s}$.
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$5 \text{ W}$. Using $P = \frac{E}{t} = \frac{20}{4} = 5$ W.
$5 \text{ W}$. Using $P = \frac{E}{t} = \frac{20}{4} = 5$ W.
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Determine the power if $400 \text{ J}$ of energy is consumed in $10 \text{ s}$.
Determine the power if $400 \text{ J}$ of energy is consumed in $10 \text{ s}$.
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$40 \text{ W}$. Using $P = \frac{E}{t} = \frac{400}{10} = 40$ W.
$40 \text{ W}$. Using $P = \frac{E}{t} = \frac{400}{10} = 40$ W.
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