Welcome to the Quiz!
This quiz contains 12 questions from a mix of 1 subtopics.
Which of the following equations correctly relates the energy stored in a capacitor to its capacitance and voltage?
W = CV
W = CV²
W = 2CV²
W = ½CV²
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A capacitor with a capacitance of 0.02 F is charged to a potential difference of 10 V. How much energy is stored in the capacitor?
0.1 J
2 J
1 J
0.2 J
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Which of the following applications rely on a capacitor's ability to discharge energy quickly?
all of the above
camera flashes
backup power supplies
smoothing potential difference fluctuations
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A capacitor is charged to a voltage of 5 V and stores 0.1 J of energy. What is its capacitance?
0.008 F
0.002 F
0.004 F
0.01 F
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Explain how a capacitor stores energy when connected to a battery.
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Describe two practical applications of capacitors and explain how they rely on the properties of capacitors.
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A capacitor with a capacitance of 5μF is charged to a potential difference of 12 V. Calculate the energy stored by the capacitor.
J
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A capacitor with a capacitance of 5 Farads is charged to a voltage of 10 Volts. Calculate the energy stored in the capacitor.
50 J
250 J
100 J
25 J
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Calculate the charge stored in a capacitor with a capacitance of 0.02 Farads when the voltage across it is 50 Volts.
0.5 C
1.5 C
5 C
1 C
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A capacitor of 0.5 Farads is connected across a 20 Volt supply. What is the energy stored in this capacitor?
10 J
100 J
5 J
200 J
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What is the capacitance of a capacitor that stores 2 Joules of energy when connected to a 4 Volt battery?
0.25 F
0.5 F
1 F
2 F
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If a capacitor discharges 0.5 Coulombs of charge through a light bulb when connected to a 6 Volt supply, how much energy was stored in the capacitor?
1.5 J
2 J
6 J
3 J
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