| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.48 |
| Score | 0% | 70% |
Using a fuse with a current rating higher than that required by a circuit:
makes the circuit less safe |
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makes no difference |
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is required |
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is recommended |
A fuse is a type of low resistance resistor that stops current flow in a circuit in response to a larger than intended electric current flow. Using a fuse with a higher current rating than required by a circuit is less safe as it could potentially allow overcurrent and risk a fire or heat-related equipment damage.
An engineer who wants to document an electric circuit would create which of the following?
a layout |
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a blueprint |
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a schematic |
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a matrix |
A schematic is the proper name for a drawing of an electric or electronic circuit.
Which of the following statements about electrical resistance is true?
electrically conductive materials have no resistive properties |
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the more resistive the conductor is the slower electron flow will be |
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the more resistive the conductor is the faster electron flow will be |
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the less resistive the conductor is the slower electron flow will be |
Resistance is opposition to the flow of current. As resistance increases, current decreases as resistance and current are inversely proportional.
This circuit component symbol represents a(n):
capacitor |
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diode |
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fuse |
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resistor |
Fuses are thin wires that melt when the current in a circuit exceeds a preset amount. They help prevent short circuits from damaging circuit components when an unusually large current is applied to the circuit, either through component failure or spikes in applied voltage.
Which of the following will increase the magnetic field produced by the electric current in a wire?
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 |
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construct the wire from insulative material |
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.