| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.86 |
| Score | 0% | 57% |
| 12V 100A | |
| 48V 100A | |
| 24V 50A | |
| 48V 25A |
Connecting the 4 batteries in series multiplies their voltage while keeping their current the same yielding a 48V 25A configuration. Connecting the 4 batteries in parallel multiplies their current while keeping their voltage the same yielding a 12V 100A configuration. Using a series-parallel connection, 2 batteries can be connected in series and 2 can be connected in parallel resulting in a 24V 50A configuration.
What kind of diode allows current to flow in the opposite direction once a certain voltage threshold is reached?
zener diode |
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standard diode |
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v-type diode |
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light emitting 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.
You would measure the amount of resistance at a certain point in a circuit with a(n):
potentiometer |
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voltmeter |
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ohmmeter |
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ammeter |
Resistance is opposition to the flow of current and is measured in ohms (Ω). An ohmmeter is used to measure the amount of resistance at a certain point in a circuit.
The valence shell of a conductor is how full of electrons?
half full |
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less than half full |
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full |
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more than half full |
Conductors are elements that allow electrons to flow freely. Their valence shell is less than half full of electrons that are able to move easily from one atom to another.
The voltage output of a transformer primarily depends on which of the following?
the diameter of the wire in the coils |
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the number of turns in the wire of the coils |
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the diameter of the coils |
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the conductor used for the wire in the coils |
A transformer utilizes an inductor to increase or decrease the voltage in a circuit. AC flowing in a coil wrapped around an iron core magnetizes the core causing it to produce a magnetic field. This magnetic field generates a voltage in a nearby coil of wire and, depending on the number of turns in the wire of the primary (source) and secondary coils and their proximity, voltage is induced in the secondary coil.