Malvino
- 1.
An ideal voltage source has
- A.
Zero internal resistance
- B.
Infinite internal resistance
- C.
A load-dependent voltage
- D.
A load-dependent current
Correct Answer
A. Zero internal resistance -
- 2.
A real voltage source has
- A.
Zero internal resistance
- B.
Infinite internal resistance
- C.
A small internal resistance
- D.
A large internal resistance
Correct Answer
C. A small internal resistance -
- 3.
If a load resistance is 1 kohm, a stiff voltage source has a resistance of
- A.
At least 10 ohm
- B.
Less than 10 ohm
- C.
More than 100 kohm
- D.
Less than 100 kohm
Correct Answer
B. Less than 10 ohm -
- 4.
An ideal current source has
- A.
Zero internal resistance
- B.
Infinite internal resistance
- C.
A load-dependent voltage
- D.
A load-dependent current
Correct Answer
B. Infinite internal resistance -
- 5.
A real current source has
- A.
Zero internal resistance
- B.
Infinite internal resistance
- C.
A small internal resistance
- D.
A large internal resistance
Correct Answer
D. A large internal resistance -
- 6.
If a load resistance is 1 kohm, a stiff current source has a resistance of
- A.
At least 10 ohm
- B.
Less than 10 ohm
- C.
More than 100 kohm
- D.
Less than 100 kohm
Correct Answer
C. More than 100 kohm -
- 7.
The Thevenin voltage is the same as the
- A.
Shorted-load voltage
- B.
Open-load voltage
- C.
Ideal source voltage
- D.
Norton voltage
Correct Answer
B. Open-load voltage -
- 8.
The Thevenin resistance is equal in value to the
- A.
Load resistance
- B.
Half the load resistance
- C.
Internal resistance of a Norton circuit
- D.
Open-load resistance
Correct Answer
C. Internal resistance of a Norton circuit -
- 9.
To get the Thevenin voltage, you have to
- A.
Short the load resistor
- B.
Open the load resistor
- C.
Short the voltage source
- D.
Open the voltage source
Correct Answer
B. Open the load resistor -
- 10.
To get the Norton current, you have to
- A.
Short the load resistor
- B.
Open the load resistor
- C.
Short the voltage source
- D.
Open the current source
Correct Answer
A. Short the load resistor -
- 11.
The Norton current is sometimes called the
- A.
Shorted-load current
- B.
Open-load current
- C.
Thevenin current
- D.
Thevenin voltage
Correct Answer
A. Shorted-load current -
- 12.
A solder bridge
- A.
May produce a short
- B.
May cause an open
- C.
Is useful in some circuits
- D.
Always has high resistance
Correct Answer
A. May produce a short -
- 13.
A cold-solder joint
- A.
Shows good soldering technique
- B.
Usually produces an open
- C.
Is sometimes useful
- D.
Always has low resistance
Correct Answer
B. Usually produces an open -
- 14.
An open resistor has
- A.
Infinite current through it
- B.
Zero voltage across it
- C.
Infinite voltage across it
- D.
Zero current through it
Correct Answer
D. Zero current through it -
- 15.
A shorted resistor has
- A.
Infinite current through it
- B.
Zero voltage across it
- C.
Infinite voltage across it
- D.
Zero current through it
Correct Answer
B. Zero voltage across it -
- 16.
An ideal voltage source and an internal resistance is an example of the
- A.
Ideal approximation
- B.
Second approximation
- C.
Higher approximation
- D.
Exact model
Correct Answer
B. Second approximation -
- 17.
Treating a connecting wire as a conductor with zero resistance is an example of the
- A.
Ideal approximation
- B.
Second approximation
- C.
Higher approximation
- D.
Exact model
Correct Answer
A. Ideal approximation -
- 18.
The voltage out of an ideal voltage source
- A.
Is zero
- B.
Is constant
- C.
Depends on the value of load resistance
- D.
Depends on the internal resistance
Correct Answer
B. Is constant -
- 19.
The current out of an ideal current source
- A.
Is zero
- B.
Is constant
- C.
Depends on the value of load resistance
- D.
Depends on the internal resistance
Correct Answer
B. Is constant -
- 20.
Thevenin’s theorem replaces a complicated circuit facing a load by an
- A.
Ideal voltage sourceand parallel resistor
- B.
Ideal current source and parallel resistor
- C.
Ideal voltage source and series resistor
- D.
Ideal current source and series resistor
Correct Answer
C. Ideal voltage source and series resistor -
- 21.
Norton’s theorem replaces a complicated circuit facing a load by an
- A.
Ideal voltage sourceand parallel resistor
- B.
Ideal current source and parallel resistor
- C.
Ideal voltage source and series resistor
- D.
Ideal current source and series resistor
Correct Answer
B. Ideal current source and parallel resistor -
- 22.
One way to short a device is
- A.
With a cold-solder joint
- B.
With a solder bridge
- C.
By disconnecting it
- D.
By opening it
Correct Answer
B. With a solder bridge -
- 23.
Derivations are
- A.
Discoveries
- B.
Inventions
- C.
Produced by mathematics
- D.
Always called theorems
Correct Answer
C. Produced by mathematics -
- 24.
Laws are proved by
- A.
Definition
- B.
Experiment
- C.
Mathematics
- D.
Formulas
Correct Answer
B. Experiment -
- 25.
Definitions are
- A.
Man made
- B.
Invented
- C.
Made up
- D.
All of the above
Correct Answer
D. All of the above -
- 26.
The nucleus of a copper atom contains how many protons?
- A.
1
- B.
4
- C.
18
- D.
29
Correct Answer
D. 29 -
- 27.
The net charge of a neutral copper atom is
- A.
0
- B.
+1
- C.
-1
- D.
+4
Correct Answer
A. 0 -
- 28.
Assume the valence electron is removed from a copper atom. The net charge of the atom becomes
- A.
0
- B.
+1
- C.
-1
- D.
+4
Correct Answer
B. +1 -
- 29.
The valence electron of a copper atom experiences what kind of attraction toward the nucleus?
- A.
None
- B.
Weak
- C.
Strong
- D.
Impossible to say
Correct Answer
B. Weak -
- 30.
How many valence electrons does a silicon atom have?
- A.
0
- B.
1
- C.
2
- D.
4
Correct Answer
D. 4 -
- 31.
Which is the most widely used semiconductor?
- A.
Copper
- B.
Germanium
- C.
Silicon
- D.
None of the above
Correct Answer
C. Silicon -
- 32.
How many protons does the nucleus of a silicon atom contain?
- A.
4
- B.
14
- C.
29
- D.
32
Correct Answer
B. 14 -
- 33.
Silicon atoms combine into an orderly pattern called a
- A.
Covalent bond
- B.
Crystal
- C.
Semiconductor
- D.
Valence orbit
Correct Answer
B. Crystal -
- 34.
An intrinsic semiconductor has some holes in it at room temperature. What causes these holes?
- A.
Doping
- B.
Free electrons
- C.
Thermal energy
- D.
Valence electrons
Correct Answer
C. Thermal energy -
- 35.
Each valence electron in an intrinsic semiconductor establishes a
- A.
Covalent bond
- B.
Free electron
- C.
Hole
- D.
Recombination
Correct Answer
A. Covalent bond -
- 36.
The merging of a free electron and a hole is called
- A.
Covalent bonding
- B.
Lifetime
- C.
Recommendation
- D.
Thermal energy
Correct Answer
C. Recommendation -
- 37.
At room temperature an intrinsic silicon crystal acts approximately like
- A.
A battery
- B.
A conductor
- C.
An insulator
- D.
A piece of copper wire
Correct Answer
C. An insulator -
- 38.
The amount of time between the creation of a hole and its disappearance is called
- A.
Doping
- B.
Lifetime
- C.
Recombination
- D.
Valence
Correct Answer
B. Lifetime -
- 39.
The valence electron of a conductor is also called a
- A.
Bound electron
- B.
Free electron
- C.
Nucleus
- D.
Proton
Correct Answer
B. Free electron -
- 40.
A conductor has how many types of flow?
- A.
1
- B.
2
- C.
3
- D.
4
Correct Answer
A. 1 -
- 41.
A semiconductor has how many types of flow?
- A.
1
- B.
2
- C.
3
- D.
4
Correct Answer
B. 2 -
- 42.
When a voltage is applied to a semiconductor, holes will flow
- A.
Away from the negative potential
- B.
Toward the positive potential
- C.
In the external circuit
- D.
None of the above
Correct Answer
D. None of the above -
- 43.
A conductor has how many holes?
- A.
Many
- B.
None
- C.
Only those produced by thermal energy
- D.
The same number as free electrons
Correct Answer
B. None -
- 44.
In an intrinsic semiconductor, the number of free electrons
- A.
Equals the number of holes
- B.
Is greater than the number of holes
- C.
Is less than the number of holes
- D.
None of the above
Correct Answer
A. Equals the number of holes -
- 45.
Absolute zero temperature equals
- A.
-273 degrees C
- B.
0 degrees C
- C.
25 degrees C
- D.
50 degrees C
Correct Answer
A. -273 degrees C -
- 46.
At absolute zero temperature an intrinsic semiconductor has
- A.
A few free electrons
- B.
Many holes
- C.
Many free electrons
- D.
No holes or free electrons
Correct Answer
D. No holes or free electrons -
- 47.
At room temperature an intrinsic semiconductor has
- A.
A few free electrons and holes
- B.
Many holes
- C.
Many free electrons
- D.
No holes
Correct Answer
A. A few free electrons and holes -
- 48.
The number of free electrons and holes in an intrinsic semiconductor increases when the temperature
- A.
Decreases
- B.
Increases
- C.
Stays the same
- D.
None of the above
Correct Answer
B. Increases -
- 49.
The flow of valence electrons to the left means that holes are flowing to the
- A.
Left
- B.
Right
- C.
Either way
- D.
None of the above
Correct Answer
B. Right -
- 50.
Holes act like
- A.
Atoms
- B.
Crystals
- C.
Negative charges
- D.
Positive charges
Correct Answer
D. Positive charges -
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Current Version
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Mar 22, 2022Quiz Edited by
ProProfs Editorial Team -
Jul 03, 2013Quiz Created by
EcE_phoenix
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