Electric Circuits Theory 2

EE6202 Electric Circuits Theory 2

A capacitor is an open circuit to dc.	True
Compute the charge stored on a 33-µF capacitor with 20V across it.	660µC
The unit of inductance is named in honor of	Joseph Henry
The voltage on a capacitor cannot change instantaneously.	True
The unit for capacitance is named after physicist	Michael Faraday
Find the equivalent inductance of the circuit below.	18H
If a 6-µf capacitor is connected to a voltage source with v(t) =20 sin 3000t V, determine the current through the capacitor.	3.6cos3000t A(wrong)
The current through an inductor cannot change abruptly.	True
A ____________ consists of two conducting plates separated by an insulator (or dielectric)	Capacitor
Find the equivalent capacitance of the circuit below.	3.9µF(wrong)
Which equation shows the natural response of the voltage of an RL circuit?	I0Re−(RL)tI0Re−(RL)t
The formula for time constant is	τ=LRτ=LR
In the circuit below, the voltage and current expressions are v=160e−10tVv=160e−10tV, t≥0+t≥0+, i=6.4e−10tAi=6.4e−10tA, t≥0t≥0. Find R.	25Ω25Ω
The currents and voltages that arise when the inductor or capacitor is disconnected abruptly from its dc source are referred to as the ___________ of the circuit.	Natural response
The currents and voltages that arise when energy is being acquired by an inductor or capacitor due to the sudden application of a dc voltage or current source. This response is referred to as the ____________.	Step response
Which equation shows the natural response of the voltage of an RC circuit?	V_0e^{-\tfrac {t}{\tau}V_0e^{-\tfrac {t}{\tau}
Which equation shows the natural response of the current of an RL circuit?	\(I_0Re^-{\left(\tfrac {R}{L}\right)t}\)(wrong)
The switch in the circuit below has been open for a long time. At t = 0 the switch is closed. Determine \(i_0(t)\).	\(1e^{-250t}A, t ≥ 0\)(wrong)
Which equation shows the natural response of the voltage of an RC circuit?	\(\frac {V(0)}{R} e^{-\frac {t}{\tau}\)
\(V_0e^{\tfrac {t}{\tau}\)
\(\frac {V(0)}{R} e^{\frac {t}{\tau}\)
The switch in the circuit below has been open for a long time. At t = 0 the switch is closed. Determine \(i_0(0)\).	0.5 A
The solution  is used when the current response is determined to be	Underdamped
When  the response of a second-order circuit is	Critically damped
The equation for neper frequency of the series RLC circuit is the same as the equation of the parallel RLC circuit	False
The equations for resonant and damped radian frequencies for the series and the parallel RLC circuit are the same.	True
When  the response of a second-order circuit is	Underdamped
The solution   is used when the current response is determined to be
Underdamped(incorrect)
The solution  is used when the current response is determined to be	Underdamped(incorrect)
The equation s2 RLs+1LC=0RLs+1LC=0 is the characteristic equation for the	Series RLC circuit
When  the response of a second-order circuit is	Overdamped
In the circuit below  Will the response be overdamped, underdamped, or critically damped?	Overdamped
The nature of the roots s1 and s2  depends on the values of aa and ωω0	True
In the formula  we denote aa as the	Neper frequency
The s2  + sRc+1Lc=0sRc+1Lc=0 is called the _____________ of the differential equation.	Characteristic equation
In the formula	Alpha frequency(incorrect)
In the formula  we denote ωω0 as the	Resonant radian frequency
The neper frequency reflects the effects of the dissipative element	True
The solution  is used when the current response is determined to be	Underdamped
When  the response of a second-order circuit is	Critically damped
The equation for neper frequency of the series RLC circuit is the same as the equation of the parallel RLC circuit	False
The equations for resonant and damped radian frequencies for the series and the parallel RLC circuit are the same.	True
When  the response of a second-order circuit is	Underdamped
The solution   is used when the current response is determined to be	Underdamped(incorrect)
The solution  is used when the current response is determined to be	Underdamped(incorrect)
The equation s2 RLs+1LC=0RLs+1LC=0 is the characteristic equation for the	Series RLC circuit
When  the response of a second-order circuit is	Overdamped
The nature of the roots s1 and s2  depends on the values of aa and ωω0	True
The voltage on a capacitor can change instantaneously.	False
The current through an inductor can change abruptly.	False
In the formula  we denote aa as the	Neper frequency
For the circuit in the figure below, no energy is stored in the 100mH inductor or the 0.4 μFμF capacitor when the switch is closed. The voltage response is	Underdamped
In the equation v=Vmcos(ωt+ϕ),ϕv=Vmcos(ωt+ϕ),ϕ  is called the _____________.	Phase angle
A sinusoidal current has a maximum amplitude of 20 A. the current pases through one complete cycle in 1 ms. The magnitude of the current at zero time is 10 A. What is the frequency of the current in hertz?	1000 Hz
This is the square root of the mean value of the squared function.	RMS value
When  the response of a second-order circuit is	Overdamped(wrong)
This is the number of cycles per second of the sine function.	Frequency
In the formula	Characteristic roots
When  the response of a second-order circuit is	Underdamped(wrong)
In the formula  we denote ωω0 as the	Resonant radian frequency
The neper frequency reflects the effects of the dissipative element	True
The currents and voltages that arise when energy is being acquired by an inductor or capacitor due to the sudden application of a dc voltage or current source. This response is referred to as the ____________.	Step response
A sinusoidal voltage source produces a voltage that varies sinusoidally with time.	True
A sinusoidal voltage is given by the expression v=300cos(120πt+30∘)v=300cos(120πt+30∘) . What is the period of the voltage in milliseconds?	16.67 ms
When  the response of a second-order circuit is	Critically damped
For the circuit in the figure below, no energy is stored in the 100mH inductor or the capacitor when the switch is closed. Which two are the roots of the characteristic equation? (Choose two)	(-1400 - j4800) rad/s(1400 - 4800) rad/s
A sinusoidal current has a maximum amplitude of 20 A. the current pases through one complete cycle in 1 ms. The magnitude of the current at zero time is 10 A. What is the frequency of the current in hertz?	1000 Hz
The time required for the sinusoidal function to pass through all its possible values is referred to as the ____________ of the cycle	Period
A sinusoidal current source produces a voltage that varies sinusoidally with time.	False
The equations for resonant and damped radian frequencies for the series and the parallel RLC circuit are the same.	True
The currents and voltages that arise when the inductor or capacitor is disconnected abruptly from its dc source are referred to as the ___________ of the circuit.	Natural response
The equation for neper frequency of the series RLC circuit is the same as the equation of the parallel RLC circuit	False
In the circuit below  Will the response be overdamped, underdamped, or critically damped?	Overdamped
The rules for combining impedances in series or parallel are the same as those for resistors.	True
The basic circuit analysis and tools covered in Electric Circuit Theory 1 cannot be used to analyze circuits in the frequency domain.	False
The rules for delta-to-wye transformations for impedances are the same as those for resistors.	True
The equation Z1=Z1Z2+Z2Z3+Z3Z1Z1Z1=Z1Z2+Z2Z3+Z3Z1Z1 is used when doing	Delta-to-wye transformations-incorrect
The phasor voltage at the terminals of a resistor is the resistance times the phasor current.	True
The equation Z2=ZcZaZa+Zb+ZcZ2=ZcZaZa+Zb+Zc is used when doing	Delta-to-wye transformations
This allows us to simplify a circuit comprised of sources and impedances into an equivalent circuit consisting of a current source and a parallel impedance	Thévenin equivalent circuits (incorrect)
This allows us to exchange a voltage source and a series impedance for a current source and a parallel impedance and vice versa.	Source transformations
The image below shows a
	Source transformation in the frequency domain
The equation v1+v2+...+vn=0v1+v2+...+vn=0  is the statement of Kirchhoff’s voltage law as it applies to a set of sinusoidal voltages in the	Time domain
For a resistor, the voltage and current are	In phase
The source transformations and the Thévenin-Norton Equivalent Circuits discussed previously in Electric Circuit Theory 1 are analytical techniques that can also be applied to frequency-domain circuits.	True
The equation V1+V2+...+Vn=0V1+V2+...+Vn=0 is the statement of Kirchhoff’s voltage law as it applies to a set of sinusoidal voltages in the	Frequency domain
For a capacitor, the voltage and current are	Out of phase, current leads by 90°
This allows us to simplify a circuit comprised of sources and impedances into an equivalent circuit consisting of a voltage source and a series impedance	Delta-to-wye transformation (incorrect)
In the equation i=Imcos(ωt+θi),Imi=Imcos(ωt+θi),Im is called the _____________.	Phase angle
In the figure, the voltage and the current are	In phase
The equation i1+i2+...+in=0i1+i2+...+in=0 is the statement of Kirchhoff’s current law as it applies to a set of sinusoidal currents in the	Time domain
For n inductor, the voltage and current are	Out of phase, current lags by 90°
The image below shows a
	Thévenin equivalent circuit in the frequency domain
Impedances connected in parallel can be combined into a single impedance by	Adding the reciprocal of the individual impedances and getting the reciprocal
This allows us to exchange a voltage source and a series impedance for a current source and a parallel impedance and vice versa.	Source transformations
The impedance of an inductor is denoted by	J(−1/ωC)J(−1/ωC)
The interconnected impedances can be reduced to a single equivalent impedances by means of a	Norton equivalent circuits(incorrect)
In the equation i=Imcos(ωt+θi),ωi=Imcos(ωt+θi),ω is called the _____________.	Angular frequency
When impedances are in parallel, they carry the same	Phasor current
When impedances are in series, they carry the same	Phasor voltage
In the equation i=Imcos(ωt+θi),θii=Imcos(ωt+θi),θi is called the _____________.	Phase angle
Impedances connected in series can be combined into a single impedance by	Adding the individual impedances