Practice Test: Question Set - 14
1. The valence electron of a copper atom experiences what kind of attraction toward the nucleus?
- (A) Strong
- (B) Neutral
- (C) Weak
- (D) Impossible
to say
2. Doubling the number of turns of wire in an inductor:
- (A) Reduces the
value of inductance by one-half
- (B) Multiplies
the value of inductance by two
- (C) Multiplies
the value of inductance by four
- (D) Reduces the
value of inductance by one-fourth
3. What is the primary difference between primary and secondary cell batteries?
- (A) Primary-cell
batteries can be recharged and used many times, whereas secondary-cell
batteries cannot be properly recharged
- (B) Secondary-cell
batteries can be recharged and used many times, whereas primary-cell batteries
cannot be properly recharged
- (C) Primary-cell
batteries use chemical cells, whereas secondary-cell batteries use an
alternative energy source, such as thermal or magnetic energy, to supplement
their outputs
- (D) Primary-cell
batteries must be recharged at a much slower rate that secondary-cell batteries
4. The rise time of a pulse waveform is the time required for the voltage to rise:
- (A) From zero to
its rms value
- (B) From zero to
its peak value
- (C) From 10% of
the peak value to 70.7% of the peak value
- (D) From 10% of
the peak value to 90% of the peak value
5. A loadstone is:
- (A) A
natural magnet
- (B) A
temporary magnet
- (C) An
artificial magnet
- (D) A
paramagnetic alloy
6. What form of energy is used to maintain an imbalance of charges between the terminals of a battery?
- (A) Electronical
energy
- (B) Mechanical
energy
- (C) Chemical
energy
- (D) Solar
energy
7. What are the main parts of an atom?
- (A) Protons only
- (B) Electrons,
protons, and ions
- (C) Electrons,
ions, and neutrons
- (D) Electrons,
protons, and neutrons
8. A high-pass filter:
- (A) Passes
lower-frequency signals and reduces higher-frequency signals
- (B) Passes
higher-frequency signals and reduces lower-frequency signals
- (C) Has no
effect on ac signals
- (D) Increases
the level of all frequencies by a significant amount
9. 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
voltage source
10. If a load resistance is 1 kW, a stiff current source has a resistance of
- (A) At least 10
Ohm
- (B) Less than 10
Ohm
- (C) More than
100 k Ohm
- (D) Less than
100 k Ohm
11. The dielectric constant of a material is a measure of:
- (A) The amount
of voltage it can withstand before breaking down
- (B) How well the
material concentrates electrostatic lines of force
- (C) The amount
of opposition to the current flow
- (D) How well the
material concentrates magnetic lines of force
12. Which one of the following statements is true for current flowing in a series circuit?
- (A) The amount
of current flow through each part of a series circuit can be different,
depending on the resistance of each part and the amount of voltage applied to
it
- (B) The
total current in a series circuit is equal to the sum of the currents flowing
through the individual components in the circuit
- (C) The same
current flows through every part of a series circuit
- (D) The
total current in a series circuit is equal to the total voltage multiplied by
the total resistance
13. Determine the resistance value and tolerance of a resistor that has the following color bands; first band is red, second band is red, third band is orange, and the fourth band is gold
- (A) 220 Ohm, 5%
- (B) 220 Ohm, 10%
- (C) 22,000 Ohm,
5%
- (D) 22,000 Ohm,
10%
14. For a pure capacitor:
- (A) AC current
and voltage are exactly in phase
- (B) AC current
leads the voltage by 90 degree
- (C) AC current
is converted to dc voltage
- (D) AC current
lags the voltage by 90 degree
15. Which one of the following properties of a magnetic circuit can be directly compared to voltage in an electrical circuit?
- (A) Flux density
- (B) Number of
lines of force
- (C) Magnetomotive
force
- (D) Reluctance
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