| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.74 |
| Score | 0% | 55% |
Current is the rate of flow of electrons per unit time and is measured in:
amperes |
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coulombs |
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volts |
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ohms |
Current is the rate of flow of electrons per unit time and is measured in amperes (A). A coulomb (C) is the quantity of electricity conveyed in one second by a current of one ampere.
The diameter of a number 12 wire is __________ the diameter of a number 6 wire?
triple |
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more than |
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double |
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less than |
The larger the number the smaller the diameter of the wire. So, the diameter of a number 12 wire is less than the diameter of a number 6 wire.
This circuit component symbol represents a(n):
DC source |
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AC source |
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transformer |
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capacitor |
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?
half full |
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more than half full |
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full |
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less 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.
Inductance is a factor in which of the following?
a DC circuit |
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an AC circuit |
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determining energy stored by a capacitor |
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batteries connected in serial |
Inductance is a property of an AC circuit (or a component in an AC circuit) that quantifies resistance to changes in current. The current in an AC circuit is continuously changing and inductive reactance (the opposition to change) depends both on the inductance of the circuit or component and the rate at which the current is changing.