101 Basic Series - Module 02 - Post Assessment
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1
What is the wattage of a 120 volt household light bulb that has a resistance of 192 ohms and uses .625 amps? (P = I
^{2 }
x R).
75 Watts
240 Watts
40 Watts
None of the above
2
A(n)________is the basic unit of power, the amount of work accomplished when one volt causes one ampere to pass through a circuit.
Watt
Ampere
Ohm
Volt
3
Single-phase is used where large blocks of power are required in commercial and industrial facilities.
True
False
4
In the United States, Alternating Current (AC) is generated at ____________ hertz.
50
60
120
None of the above
5
Electromagnetism is an interaction between electric current and a magnetic field.
True
False
6
Electromagnetism is an interaction between a magnetic field and a voltage source.
True
False
7
Voltage is the rate at which energy is drawn from a source that produces a flow of electricity in a circuit.
True
False
8
The current flow in a parallel circuit divides itself between the branches back to the source.
True
False
9
The three methods that voltage forces current to flow are direct current, alternating current, and pulsating current.
True
False
10
In a series circuit, when more than one resistance is in the circuit, the resistances are multiplied together to get the total resistance. (R
_{T}
)
True
False
11
Ohm's law is represented using a triangular diagram to determine the proper formulas to calculate voltage, current (amps) and resistance.
True
False
12
The voltage value as measured across each resistor or load, in a series circuit, is called
Voltage rise
Voltage drop
Voltage peak
Voltage fall
13
Using the triangle that represents Ohm's law, the formula for calculating current is
E = I x R
R = E/I
I = E/R
14
Insulators are materials that don't readily give up electrons, thereby restricting the flow of current.
True
False
15
A magnetic field consists of lines of force, which are more commonly referred to as flux lines.
True
False
16
If the diameter of a conductor is doubled, the resistance is doubled.
True
False
17
The instantaneous value of a sine wave is the value at any particular time from zero to the peak value.
True
False
18
Despite the fact that it has been positively determined that electron flow is the correct theory, conventional flow theory still dominates the industry.
True
False
19
The peak value of a sine wave occurs at the positive maximum and again at the negative maximum.
True
False
20
Electrons can be freed by applying an external force, such as movement through a magnetic field, heat, friction, or a chemical reaction.
True
False
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