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15
×
In an inductive circuit, does current lead or lag voltage?
Lag
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15
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In a capacitive circuit, current leads or lags voltage?
Lead
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15
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What does a power factor of 1 indicate about a circuit?
That all the power is being usedย effectively โ no reactive component
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15
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How does the frequency affect inductive reactance?
It increases โ XL is proportional to frequency.
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15
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Explain why the power waveform in AC circuits has twice the frequency of voltage/current.
Because both current and voltage are sinusoidal and their product results in a sine-squared waveform.
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15
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What is the average true power in a purely inductive AC circuit?
Zero
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15
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Which type of component alternately stores and returns energy in the form of a magnetic field?
Inductor
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lifesaver
Give 20 points!
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fairy
Take points!
5
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25
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shark
Other team loses 25 points!
Okay!
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baam
Lose 20 points!
Oops!
15
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What is the formula for calculating reactive power using current and reactance?
Q = Iยฒ ร X (or Q = Vยฒ / X
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baam
Lose 15 points!
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seesaw
Swap points!
Okay!
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fairy
Take points!
5
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25
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banana
Go to last place!
Oops!
15
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What unit is used to measure reactive power?
VAR (Volt-Amps Reactive)
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15
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What type of power is associated with energy returned to the source?
Reactive Power
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heart
Other team wins 25 points!
Oops!
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gold
Win 50 points!
Okay!
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rocket
Go to first place!
Okay!
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thief
Give points!
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25
15
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What is the formula for capacitive reactance (XC)?
XC = 1 / (2ฯfC)
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heart
Other team wins 25 points!
Oops!
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magnet
Take 20 points!
Okay!
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rocket
Go to first place!
Okay!
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thief
Give points!
5
10
15
20
25
15
×
Why does a pure inductor not dissipate power as heat?
Because an ideal inductor stores energy in its magnetic field and returns it to the source
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