In order to get maximum power transfer from a capacitive source, the load must
have a capacitive reactance equal to circuit resistance
have an impedance that is the complex conjugate of the source impedance
be as capacitive as it is inductive
none of the above
Q.2.
Referring to the given circuit, how much power, in watts, is delivered to the speaker at the determined frequency if VS = 4.5 VRMS?
226 mW
2.26 mW
4.24 mW
424 mW
Q.3.
For the circuit shown, determine ZTH for the portion of the circuit external to RL.
66.7 ∠-33.7° kΩ
6.67 ∠-333.7° kΩ
14.4 ∠-56.3° kΩ
1.44 ∠-33.7° kΩ
Q.4.
Referring to the given circuit, find ZTH for the part of the circuit that is external to RL.
129 ∠21.4° Ω
43.7 ∠68.6° Ω
43.7 ∠21.4° Ω
12.9 ∠68.6° Ω
Q.5.
Referring to the given circuit, determine ZTH as seen by RL.
1444 ∠-48.5° Ω
4176 ∠-73.3° Ω
956 ∠-48.5° Ω
1444 ∠-73.3° Ω
Q.6.
Referring to the given figure, determine ZTH as seen by RL if R1 is changed to 3.3 kΩ.
1488 ∠-70.7° Ω
3859 ∠-31.2° Ω
5180 ∠-50.5° Ω
1828 ∠-50.2° Ω
Q.7.
Determine VTH if R1 is changed to 3.3 kΩ.
0.574 ∠16.7° V
4.63 ∠16.7° V
4.63 ∠39.5° V
0.463 ∠39.5° V
Q.8.
Referring to the given circuit, what is ZTH if R1 is changed toΩ?
225 ∠12.1° Ω
225 ∠77.9° Ω
46 ∠77.9° Ω
46 ∠12.1° Ω
Q.9.
Norton's theorem gives
An equivalent current source in parallel with an equivalent impedance
An equivalent current source in series with an equivalent impedance
An equivalent voltage source in parallel with an equivalent impedance
An equivalent voltage source in series with an equivalent impedance
Q.10.
If two currents are in the same direction at any instant of time in a given branch of a circuit, the net current at that instant
Is zero
Is the sum of the two currents
Is the difference between the two currents
Cannot be determined
Q.11.
The Thevenin equivalent voltage is
Equal to the source voltage
The same as the load voltage
The open circuit voltage
None of the above
Q.12.
Thevenin's theorem provides a method for the reduction of any ac circuit to an equivalent form consisting of an equivalent current source in parallel with an equivalent impedance.
True
False
Q.13.
Norton's theorem provides a method for the reduction of any ac circuit to an equivalent form consisting of an equivalent voltage source in series with an equivalent impedance.
True
False
Q.14.
The Norton equivalent current is
The current through the load
The open-current from the source
The short circuit current
None of the above
Q.15.
Determine the frequency at which the maximum power is transferred from the amplifier to the speaker in the given figure.
1,027 Hz
10,270 Hz
6,330 Hz
63,330 Hz
Q.16.
In applying the superposition theorem,
The sources are considered one at a time with all others replaced by their internal impedance
All sources are considered independently
All sources are considered simultaneously
The sources are considered one at a time with all others replaced by their internal resistance
Q.17.
The superposition theorem is useful for circuit analysis only in ac circuits.
True
False
Q.18.
For the circuit given, determine the Thevenin voltage as seen by RL.
0.574 ∠16.7° V
5.74 ∠16.7° V
0.574 ∠-16.7° V
5.74 ∠-16.7° V
Q.19.
Referring to the given circuit, find ZTH if R iskΩ and RL iskΩ.
89.82 ∠-51.3° kΩ
19.2 ∠-38.3° kΩ
9.38 ∠-51.3° kΩ
180 ∠-38.3° kΩ
Q.20.
A Thevenin ac equivalent circuit always consists of an equivalent ac voltage source and an equivalent capacitance.
True
False
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