| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.46 |
| Score | 0% | 69% |
The formula specifying Ohm's law is which of the following?
V = IR |
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\(V = {I \over R}\) |
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\(V = {R \over I}\) |
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V = I2R |
Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.
What is the voltage of most household electrical systems in the United States?
60Hz |
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60V |
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110V |
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220V |
Most households use electricity with a voltage of 110V.
The volt is a unit of measurement for:
voltage |
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capacitance |
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power |
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current |
Voltage (V) is the electrical potential difference between two points. Electrons will flow as current from areas of high potential (concentration of electrons) to areas of low potential. Voltage and current are directly proportional in that the higher the voltage applied to a conductor the higher the current that will result.
What is the primary difference between a rectifier and an inverter?
a rectifier converts a DC input to AC while an inverter converts an AC input to DC |
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a rectifier strips out the AC portion of electricity while an inverter strips out the DC portion |
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a rectifier converts an AC input to DC while an inverter converts a DC input to AC |
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a rectifier strips out the DC portion of electricity while an inverter strips out the AC portion |
A diode allows current to pass easily in one direction and blocks current in the other direction. Diodes are commonly used for rectification which is the conversion of alternating current (AC) into direct current (DC). Because a diode only allows current flow in one direction, it will pass either the upper or lower half of AC waves (half-wave rectification) creating pulsating DC. Multiple diodes can be connected together to utilize both halves of the AC signal in full-wave rectification.
This circuit diagram represents a(n):
series-parallel circuit |
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parallel circuit |
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series circuit |
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open circuit |
A series circuit has only one path for current to flow. In a series circuit, current (I) is the same throughout the circuit and is equal to the total voltage (V) applied to the circuit divided by the total resistance (R) of the loads in the circuit. The sum of the voltage drops across each resistor in the circuit will equal the total voltage applied to the circuit.