Q.1

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
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.3
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.4
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.5
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.6
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.7
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.8
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.9
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.10
The superposition theorem is useful for circuit analysis only in ac circuits.
  • True
  • False
Q.11
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.12
A Thevenin ac equivalent circuit always consists of an equivalent ac voltage source and an equivalent capacitance.
  • True
  • False
Q.13
An equivalent circuit is one that produces the same voltage and current to a given load as the original circuit that it replaces.
  • True
  • False
Q.14
In order to get maximum power transfer from a capacitive source, the load must have an impedance that is the complex conjugate of the source impedance.
  • True
  • False
Q.15
In an ac circuit, power to the load peaks at the frequency at which the load impedance is the complex conjugate of the output impedance.
  • True
  • False
Q.16
The superposition theorem is useful for the analysis of single-source circuits.
  • True
  • False
Q.17
Like Thevenin's theorem, Norton's theorem provides a method of reducing a more complex circuit to a simpler, more manageable form for analysis.
  • True
  • False
Q.18
For the given circuit, find VTH for the circuit external to RL.
  • 4.69 ∠51.3° V
  • 4.69 ∠38.7° V
  • 469 ∠38.7° mV
  • 6 ∠0° V
Q.19
One circuit is equivalent to another, in the context of Thevenin's theorem, when the circuits produce the same voltage.
  • True
  • False
Q.20
The two basic components of a Thevenin equivalent ac circuit are
  • The equivalent voltage source and the equivalent series impedance
  • The equivalent voltage source and the equivalent series resistance
  • The equivalent voltage source and the equivalent parallel impedance
  • The equivalent voltage source and the equivalent parallel resistance
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