| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.08 |
| Score | 0% | 62% |
What kind of diode allows current to flow in the opposite direction once a certain voltage threshold is reached?
light emitting diode |
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zener diode |
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standard diode |
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v-type diode |
A diode allows current to pass easily in one direction and blocks current in the other direction. A zener diode is a diode which allows current to flow in one direction as normal and will also allow current flow in the reverse direction when the voltage is above a certain value. This value is called the breakdown voltage.
Which of the following converts electrical energy into another form of energy in an electrical circuit?
wiring |
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AC source |
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load |
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DC source |
A load is a source of resistance that converts electrical energy into another form of energy. The components of a microwave, for example, are loads that work together to convert household electricity into radation that can be used to quickly cook food.
The formula specifying Ohm's law is which of the following?
\(V = {R \over I}\) |
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V = IR |
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\(V = {I \over R}\) |
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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.
This circuit component symbol represents a(n):
transformer |
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capacitor |
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DC source |
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AC source |
Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of direct current (DC) is a battery.
Direct current flows from the __________ terminal of the voltage source to the __________ terminal.
negative, negative |
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positive, positive |
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positive, negative |
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negative, positive |
Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of direct current (DC) is a battery.