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WorksheetsRlc Circuits
Total questions: 10
Worksheet time: 16mins
Which of the transposed reactance formulae is incorrect?
Select the correct phrase:
In a capacitive circuit the voltage leads the current.
In an inductive circuit the current lags the voltage.
In a resistive circuit, the current and voltage are out of phase.
In a capacitive circuit the current lags the voltage.
Select the correct sentence:
Active power can only be developed in a pure inductance.
Reactive power is developed in a capacitor.
Apparent power increases as the power factor increases.
Power factor is apparent power divided by active power.
Select the correct combination of quantity (equation) symbol and unit:
W, Watt
P, VAr
X, Ohm
Q, Watt
In a sinusoidal AC circuit containing an inductance and a resistance in series:
the sum of the voltages across both components, as measured by a multimeter, adds up to the supply voltage.
the voltage across both components are out of phase by 90 degrees.
the current through each component is different.
the inductance is proportional to the supply frequency.
Complete the sentence:
In a parallel circuit containing a capacitor and resistor connected to a sinusoidal supply:
the voltage across each component is the same.
the current in each component is the same.
the current in the capacitor lags the applied voltage by 90 degrees.
the total current drawn goes down as the frequency goes up.
Suppose an RLC series circuit like the one shown has (R = 91.0 Ω, C = 6.00 μF, and L = 60.0 mH) .
The source of time-varying emf has an angular frequency of (ω = 64.0 rad/s) .
1- What is the impedance of this circuit?
Z= R2+(XL−XC)2 , XL=ωL , XC=ωC1
2.60 x 103 Ω
6.77 x 106Ω
51.0 Ω
When applying a fixed voltage AC at different frequencies through a capacitor with a capacitance of C as in the opposite figure, which of the following illustrates the relationship between current and frequency?
A circuit contains a source of time-varying emf, which is given by Vemf = 120.0 sin[(377 rad/s)t] V, and a capacitor with capacitance C = 5.00 μF. What is the current in the circuit at t = 1.00 s?
Ic=ωCVcsin(ωt+2π)
0.226 A
0.451 A
0.555 A
0.750 A
The phase constant, ϕ, between the voltage and the current in an AC circuit depends on the _______.
a) inductive reactance
b) capacitive reactance
c) resistance
d) all of the above
