31. Alternating Current

Alternating Voltages and Currents

31. Alternating Current

Alternating Voltages and Currents

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07:49

Alternating Voltages and Currents

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What is Alternating Current (AC)?

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Electrical Current Explained - AC DC, fuses, circuit breakers, multimeter, GFCI, ampere

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AC Circuits: Crash Course Physics #36

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Alternating Current vs Direct Current - Rms Voltage, Peak Current & Average Power of AC Circuits

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Multiple Choice

An AC source produces an alternating current in a circuit with the function ?(?) = (1.5 ?) cos[(250 s⁻¹ )?]. What is the frequency of the source? What is the maximum current in the circuit?

230

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Multiple Choice

The current in an AC circuit takes 0.02 s to change direction. What is the angular frequency of the AC source?

216

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Multiple Choice

An AC emf source is given by

ε = (170 V) \cos {2 π (60 Hz) t}

. What is the instantaneous emf of this source at

t = 97 ms

Multiple Choice

An AC emf source is given by

ℰ = (170 V) \cos (2 π (60 Hz) t)

. What is the instantaneous emf of this source at

t = 97 ​ ms

Multiple Choice

V_{rms} = 120 V

for a certain 60 Hz outlet, what is the peak voltage across the outlet?

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