| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.19 |
| Score | 0% | 64% |
If an electrical circuit is interrupted, which of the following will result?
parallel circuit |
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short circuit |
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open circuit |
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closed circuit |
A closed circuit is a complete loop or path that electricity follows. It consists of a source of voltage, a load, and connective conductors. If the circuit is interrupted, if a wire is disconnected or cut for example, it becomes an open circuit and no electricity will flow.
Which of the following will increase the magnetic field produced by the electric current in a wire?
construct the wire from insulative material |
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wrap the wire around a ceramic core |
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construct the wire from conductive material |
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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.
Which of the following is not a terminal on a transistor?
base |
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input |
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emitter |
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collector |
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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resistance |
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energy |
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power |
The joule is a unit of measurement for energy.
Capacitors are charged by what type of current?
alternating |
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low voltage |
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direct |
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high voltage |
Capacitors store voltage and are used in circuits as temporary batteries. Capacitors are charged by DC current (AC current passes through a capacitor) and that stored charge can later be dissipated into the circuit as needed. Capacitors are often used to maintain power within a system when it is disconnected from its primary power source or to smooth out or filter voltage within a circuit.