| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.47 |
| Score | 0% | 69% |
The formula specifying Ohm's law is which of the following?
\(V = {R \over I}\) |
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\(V = {I \over R}\) |
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V = IR |
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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.
| series-parallel | |
| series | |
| orthogonal | |
| perpendicular |
Connecting the 6 batteries in series multiplies their voltage while keeping their current the same yielding a 72V 5A configuration. Connecting the 6 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 12V 30A configuration. Using a series-parallel connection, 3 batteries can be connected in series and 3 can be connected in parallel resulting in a 36V 15A configuration.
The valence shell of a semiconductor is how full of electrons?
less than half full |
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empty |
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more than half full |
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half full |
Semiconductors have valence shells that are exacly half full and can conduct electricity under some conditions but not others. This property makes them useful for the control of electrical current.
This circuit component symbol represents a(n):
fuse |
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resistor |
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diode |
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capacitor |
Fuses are thin wires that melt when the current in a circuit exceeds a preset amount. They help prevent short circuits from damaging circuit components when an unusually large current is applied to the circuit, either through component failure or spikes in applied voltage.
A transistor to an electronic circuit is like a _______________ to a house?
safe |
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driveway |
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gate |
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no trespassing sign |
A transistor works by allowing a small amount of current applied at the base to control general current flow from collector to emitter through the transistor. A transistor acts as a gate or switch for electronic signals.