| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.80 |
| Score | 0% | 56% |
This circuit component symbol represents a(n):
DC source |
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transformer |
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capacitor |
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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.
The valence shell of a conductor is how full of electrons?
less than half full |
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half full |
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more than half full |
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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.
Which of the following is not a common type of battery?
power-cycle |
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dry cell |
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deep-cycle |
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wet cell |
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. The three most common types of batteries are dry cell (used in small devices like TV remotes), wet cell (used for cars), and deep-cycle (storage batteries used primarily for backup and emergency power).
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.
Which of the following is a characteristic of batteries connected in parallel?
total current equals the sum of the individual battery currents |
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total current equals the average of the individual battery currents |
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one connection is made between each adjacent battery |
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the positive terminal of one battery is connected to the negative terminal of the next |
You can multiply the voltage or the current supplied by individual batteries by connecting them together either in series or in parallel. The characteristics of batteries connected in parallel are that total voltage equals the average of the individual battery voltages, total current equals the sum of the individual battery currents, the positive terminal of one battery is connected to the positive terminal of the next, the negative terminal of one battery is connected to the negative terminal of the next, and two connections are made between each adjacent battery.