| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.47 |
| Score | 0% | 69% |
Which of the following will increase the magnetic field produced by the electric current in a wire?
construct the wire from conductive material |
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construct the wire from insulative material |
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wind the wire into a coil |
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wrap the wire around a ceramic core |
A moving electric current produces a magnetic field proportional to the amount of current flow. This magnetic field can be made stronger by winding the wire into a coil and further enhanced if done around an iron containing (ferrous) core.
An engineer who wants to document an electric circuit would create which of the following?
a schematic |
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a matrix |
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a layout |
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a blueprint |
A schematic is the proper name for a drawing of an electric or electronic circuit.
Voltage and current are __________ proportional.
inversely |
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indirectly |
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not |
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directly |
Voltage (V) is the electrical potential difference between two points. Electrons will flow as current from areas of high potential (concentration of electrons) to areas of low potential. Voltage and current are directly proportional in that the higher the voltage applied to a conductor the higher the current that will result.
The ampere is a unit of measurement for:
energy |
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power |
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inductance |
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current |
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 joule is a unit of measurement for:
power |
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resistance |
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energy |
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capacitance |
The joule is a unit of measurement for energy.