| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.28 |
| Score | 0% | 66% |
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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wrap the wire around a ceramic core |
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wind the wire into a coil |
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.
The ampere is a unit of measurement for:
energy |
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inductance |
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current |
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power |
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.
| 60V 50A | |
| 6V 50A | |
| 30V 25A | |
| 60V 5A |
Connecting the 10 batteries in series multiplies their voltage while keeping their current the same yielding a 60V 5A configuration. Connecting the 10 batteries in parallel multiplies their current while keeping their voltage the same yielding a 6V 50A configuration. Using a series-parallel connection, 5 batteries can be connected in series and 5 can be connected in parallel resulting in a 30V 25A configuration.
This circuit component symbol represents a(n):
diode |
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transformer |
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inductor |
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transistor |
The transistor is the foundation of modern electronic devices. It is made entirely from semiconductor material (making it a solid state device) and can serve many different functions in a circuit including acting as a switch, amplifier, or current regulator. 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.
The joule is a unit of measurement for:
capacitance |
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power |
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energy |
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resistance |
The joule is a unit of measurement for energy.