NEETS Module 1 Part 1 MCQ With Answers

NEETS Module 1 Part 1 MCQ With Answers Electronics ECE Board Exam



Textbook assignment:  Chapter 1, .Turning to Electricity,. pages 1-1 through 1-65.
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1-1.  Matter can be found in which of the
following forms?

  1.  Solid
 2.  Liquid
 3.  Gaseous
  4.  Each of the above

1-2.  A substance that CANNOT be reduced to a
simpler substance by chemical means is
called a/an

  1.  element
  2.  mixture
 3.  compound
  4.  solution

1-3.  A molecule is the smallest possible particle
that retains the characteristic of which of
the following substances?

  1.  An element
 2.  A mixture
 3.  A compound
  4.  A solution

1-4.  An atom is the smallest possible particle
that retains the characteristic of which of
the following substances?

  1.  An element
 2.  A mixture
 3.  A compound
  4.  A solution

1-5.  What subatomic particle has a negative
charge and a small mass?

  1.  Proton
  2.  Electron
  3.  Positron
  4.  Neutron
1-6.  What subatomic particle has a positive
charge and a large mass?

  1.  Proton
  2.  Electron
  3.  Positron
  4.  Neutron

1-7.  What subatomic particle has no charge?

  1.  Proton
  2.  Electron
  3.  Positron
  4.  Neutron

1-8.  When light is represented as a tiny packet
of energy, what are these packets of energy
called?

  1.  Angstroms
  2.  Photons
  3.  Wavelengths
  4.  Frequencies

1-9.  If light energy collides with an orbiting
electron, what happens to the electron?

1.  The electron will move around the
same orbit faster
2.  The electron will jump to an orbit
further from the nucleus
3.  The electron will jump to an orbit
closer to the nucleus
4.  The electron will merge with the
nucleus


2
1-10.  After the action described in question 1-9
occurs, the electron will return to the
condition it had before being acted upon by
the light. When the electron returns to this
condition, which of the following actions
occurs?

  1.  The nucleus becomes lighter
  2.  The atom becomes an ion
  3.  Light energy is emitted
  4.  The valence of the atom changes

1-11. The number of electrons in the outermost
shell of an atom determines which of the
following characteristics of the atom?

  1.  Valence
  2.  Atomic weight
  3.  Atomic number
  4.  Number of shells

1-12. When an atom gains or loses an electron,
which of the following terms applies?

  1.  Unbalanced
  2.  Lightened
  3.  Neutral
  4.  Ionized

1-13. What is the main difference between
conductors, semiconductors, and
insulators?

  1.  The temperature differences
  2.  The physical state of their mass
  3.  The number of free electrons
  4.  The designations of the outer shells

1-14.  A substance with an excess of electrons is
considered to be in what electrical state?

  1.  Neutral
  2.  Positive
  3.  Negative
  4.  Discharged

1-15. Which of following actions describes the
easiest way to accumulate a static electric
charge?

1.  Friction between two conductors
2.  Friction between two insulators
3.  Pressure between two conductors
4.  Pressure between two insulators

1-16. An atom that contains 6 protons and 5
electrons has what electrical charge?

  1.  Positive
  2.  Negative
  3.  Neutral
  4.  Intermediate

1-17.  How do "like" and "unlike" charges react to
one another?

1.  Unlike charges repel each other, like
charges repel each other
2.  Unlike charges attract each other, like
charges attract each other
3.  Unlike charges repel each other, like
charges attract each other
4.  Unlike charges attract each other, like
charges repel each other

1-18. What is/are the term(s) applied to the space
between and around charged bodies in
which their influence is felt?

  1.  Electric field of force
  2.  Electrostatic field
  3.  Dielectric field
  4.  Each of the above

1-19.  Electrostatic lines of force are drawn in
which of the following manners?

1.  Entering negative charge, entering
positive charge
2.  Entering negative charge, leaving
positive charge
3.  Leaving negative charge, leaving
positive charge
4.  Leaving negative charge, entering
positive charge

3
1-20. Which of the following devices use
magnetism?

  1.  Batteries
  2.  Light bulbs
  3.  High-fidelity speakers
  4.  Each of the above

1-21. Magnetic materials have which of the
following qualities?

  1.  They are attracted by magnets
  2.  They can be magnetized
  3.  Both 1 and 2 above
  4.  They are electrical insulators

1-22. Ferromagnetic materials have which of the
following qualities?

  1.  They are all alloys
  2.  They all contain nickel
  3.  They make very weak magnets
  4.  They are relatively easy to magnetize

1-23. A material with low reluctance and high
permeability such as iron or soft steel is
used to make what type of magnet?

  1.  Temporary
  2.  Permanent
  3.  Residual
  4.  Natural

1-24. The ability of a material to retain
magnetism is called

  1.  permeability
  2.  retentivity
  3.  reluctance
  4.  ionization

1-25. The law of magnetic poles states which of
the following relationships?

  1.  Like poles attract, unlike poles attract
  2.  Like poles attract, unlike poles repel
  3.  Like poles repel, unlike poles repel
  4.  Like poles repel, unlike poles attract

1-26. The north indicating pole of a compass
needle is attracted to which of the
following poles of the earth?

  1.  The geographic north pole
  2.  The magnetic north pole
  3.  The geographic south pole
  4.  The magnetic south pole

1-27. Weber's theory of magnetism assumes that
magnetic material is composed of

1.  tiny molecular magnets
2.  domains of magnetic influence
3.  large blocks of material acting as
magnets
4.  atoms with electrons spinning different
directions

1-28. According to the domain theory, if an atom
with 26 electrons has 20 electrons spinning
counterclock-wise, the atom is considered
to be

  1.  charged
  2.  insulated
  3.  neutralized
  4.  magnetized

1-29.  If a glass plate is placed over a magnet and
iron filings are sprinkled over the glass, a
pattern will be visible. What does this
pattern indicate?

1.  The magnetic field
2.  The electrostatic field
3.  The piezoelectric effect
4.  The chemical reaction of the magnet
and the filings

1-30. An imaginary line used to illustrate a
magnetic effect is known as a/an

  1.  magnetic pole
  2.  force field pole
  3.  magnetic line of force
  4.  electrostatic line of force

4
1-31. Which of the following is NOT a property
of magnetic lines of force?

1.  They form closed loops around the
magnet
2.  They leave the magnetic material at
right angles to the surface
3.  They cross each other at right angles
4.  They leave the north pole and enter the
south pole of the magnet

1-32. A magnetic shield or screen used to protect
a delicate instrument should be made of
which of the following materials?

  1.  Plastic
  2.  Copper
  3.  Soft iron
 4.  Aluminum

1-33. Bar magnets should be stored in which of
the following manners?

1.  Separately
2.  In pairs at 90 degree angles
3.  In pairs with north poles together
4.  In pairs with a north pole and a south
pole together

1-34. What is the term applied to the ability to do
work?

 1.  Power
  2.  Energy
  3.  Voltage
  4.  Current

1-35. An object that is in motion has what type of
energy?

  1.  Kinetic
  2.  Magnetic
 3.  Newtonian
  4.  Potential

1-36. A book sitting on a shelf has what kind of
energy?

  1.  Kinetic
  2.  Potential
 3.  Newtonian
  4.  Magnetic

1-37. Which of the following term(s) apply(ies)
to the difference of potential between two
bodies?

  1.  Voltage
  2.  Electromotive force
  3.  Both 1 and 2 above
  4.  Current

1-38. Which of the following terms is equal to
"2.1 kV?"

  1.      210 V
  2.    2100 V
 3.  21,000 V
  4.          2.1 x 106 V

1-39. 250µV is equal to which of the following
terms?

  1.       .25 mV
  2.       .00025 V
  3.  250 x 10-6 V
  4.  All of the above

1-40. What is the general term that describes a
device which supplies a voltage?

  1.  A voltage source
  2.  A voltage supply
  3.  A voltage generator
  4.  A voltage producer

1-41.  In addition to friction, magnetism, and
chemical action, which of the following
methods can be used to produce a voltage?

  1.  Pressure
  2.  Heat
  3.  Light
  4.  Each of the above

IN ANSWERING QUESTIONS 1-42
THROUGH 1-46, MATCH THE VOLTAGE
PRODUCING METHOD LISTED IN COLUMN
B TO THE DEVICE LISTED IN COLUMN A.

COLUMN A

COLUMN B
1-42.  Radio receiver's
oscillator
1.  Heat
1-43.  Thermocouple  2.  Pressure
1-44.  Automobile battery  3.  Magnetism
1-45.  Automobile generator  4.  Chemical action
1-46.  Flashlight cell  
________________________________________

1-47.  Current in an electric circuit is caused by
which of the following actions?

1.  Electrons moving from negative to
positive
2.  Electrons moving from positive to
negative
3.  Protons moving from negative to
positive
4.  Protons moving from positive to
negative

1-48. When directed drift takes place, at what
speed does the effect take place?

  1.  100,000 miles per hour
  2.  186,000 miles per second
  3.  300,000 meters per hour
  4.  500,000 meters per second

1-49.  If the voltage in a circuit increases, what
happens to the current?

  1.  Current increases
  2.  Current decreases
  3.  Current remains the same
  4.  Current fluctuates rapidly

1-50. Which of the following values is equal to
100mA?

  1.    1.0 ampere
  2.  10.0 amperes
  3.    0.10 ampere
  4.    0.01 ampere

1-51. What symbol is used to represent the ohm?

 1.  A
 2.  O
 3.  µ
 4.  !

1-52.  If low weight is the major factor, which of
the following materials should be used as a
conductor?

 1.  Aluminum
  2.  Copper
  3.  Silver
 4.  Gold

1-53. What material is MOST widely used as a
conductor in electrical equipment?

 1.  Aluminum
  2.  Copper
  3.  Silver
 4.  Gold

1-54. Resistance of a conductor will increase with
which of the following changes to the
cross-sectional area and length of the
conductor?

1.  Cross-sectional area is increased, length
is increased
2.  Cross-sectional area is increased, length
is decreased
3.  Cross-sectional area is decreased,
length is increased
4.  Cross-sectional area is decreased,
length is decreased

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6
1-55. A material whose resistance decreases as
the temperature increases has what
temperature coefficient?

  1.  Positive
  2.  Negative
  3.  Zero
  4.  Neutral

1-56. A material whose resistance remains
constant as the temperature increases has
what temperature coefficient?

  1.  Positive
  2.  Negative
  3.  Zero
  4.  Neutral

1-57. Which of the following units is NOT a unit
of conductance?

  1.  Siemens
 2.  S
 3.  G
 4.  Ohm

1-58.  Resistance bears which, if any, of the
following relationships to conductance?

  1.  A direct relationship
  2.  A reciprocal relationship
  3.  An inverse square relationship
 4.  None


THIS SPACE LEFT BLANK
INTENTIONALLY.
1-59. Which of the following schematic symbols
is used to represent a resistor?



1-60. How is the ability of a resistor to dissipate
heat indicated?

  1.  By the wattage rating
  2.  By the voltage rating
  3.  By the resistance rating
  4.  By the tolerance

1-61.  Carbon resistors have which of the
following disadvantages?

  1.  A high cost factor
  2.  An extremely large physical size
  3.  The resistance value changes with age
  4.  A limited range of resistance values

1-62. Which of the following types of resistors
will overcome the disadvantages of a
carbon resistor?

  1.  Rheostat
  2.  Potentiometer
  3.  Molded composition
  4.  Wirewound resistor

1-63. What is the total number of connections on
(a) a rheostat and (b) a potentiometer?

  1.  (a) Two  (b) two
  2.  (a) Two  (b) three
  3.  (a) Three  (b) two
  4.  (a) Three  (b) three

7
1-64. Which, if any, of the following types of
variable resistors is used to control a large
amount of current?

  1.  Rheostat
  2.  Potentiometer
  3.  Wirewound potentiometer
  4.  None of the above

1-65.  A carbon resistor is color-coded orange,
orange, orange. What is the resistance
value of this resistor?

 1.  2.2 k!
 2.  3.3 k!
 3.  33.0 k!
 4.  440.0 k!

1-66. What are the allowable limits of ohmic
value in a resistor color coded blue, green,
yellow, gold?

 1.  682.5 k! to 617.5 k!
 2.  715.0 k! to 585.0 k!
  3.     7.98 M! to  7.22 M!
  4.     8.36 M! to  6.84 M!

1-67.  Of the following, which color of the fifth
band on a resistor indicates the LEAST
chance of failure?

 1.  Red
 2.  Brown
 3.  Yellow
 4.  Orange


THIS SPACE LEFT BLANK
INTENTIONALLY.

Figure 1A.—Resistor with color coding.

IN ANSWERING QUESTIONS 1-68
THROUGH 1-70, REFER TO FIGURE 1A.

1-68. What is the ohmic value of the resistor?

 1.  8!
 2.  79!
 3.  790!
 4.  800!

1-69. What is the specified tolerance of the
resistor?

  1.  1%
  2.  5%
  3.  10%
  4.  20%

1-70. What is the specified reliability of the
resistor?

  1.  1.0%
  2.  0.1%
  3.  0.01%
 4.  0.001%

Answers:
1. D
2. A
3. C
4. A
5. B
6. A
7. D
8. B
9. B
10. C
11. A
12. D
13. C
14. C
15. B
16. A
17. D
18. D
19. B
20. D
21. C
22. D
23. A
24. B
25. D
26. B
27. A
28. D
29. A
30. C
31. C
32. C
33. D
34. B
35. A
36. B
37. C
38. B
39. D
40. B
41. D
42. 2
43. 1
44. 4
45. 3
46. 4
47. A
48. B
49. A
50. C
51. D
52. --
53. A
54. C
55. B
56. C
57. D
58. B
59. D
60. A
61. C
62. D
63. B
64. B
65. C
66. A
67. B
68. C
69. B
70. C

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