| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.32 |
| Score | 0% | 66% |
Why is an insulator a poor conductor of electricity?
an insulator is made of organic material |
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an insulator is made of inorganic material |
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an insulator has few free electrons |
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an insulator has many free electrons |
Insulators have valence shells that are more than half full of electrons and, as such, are tightly bound to the nucleus and difficult to move from one atom to another.
You would measure the amount of resistance at a certain point in a circuit with a(n):
potentiometer |
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voltmeter |
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ammeter |
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ohmmeter |
Resistance is opposition to the flow of current and is measured in ohms (Ω). An ohmmeter is used to measure the amount of resistance at a certain point in a circuit.
This circuit diagram represents a(n):
series-parallel circuit |
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parallel circuit |
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series circuit |
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rectifier |
In a parallel circuit, each load occupies a separate parallel path in the circuit and the input voltage is fully applied to each path. Unlike a series circuit where current (I) is the same at all points in the circuit, in a parallel circuit, voltage (V) is the same across each parallel branch of the circuit but current differs in each branch depending on the load (resistance) present.
A diode to an electronic circuit is like a _______________ to a city?
traffic light |
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highway |
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one-way street |
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parking lot |
A diode allows current to pass easily in one direction and blocks current in the other direction.
| perpendicular | |
| parallel | |
| series-parallel | |
| series |
Connecting the 6 batteries in series multiplies their voltage while keeping their current the same yielding a 90V 5A configuration. Connecting the 6 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 15V 30A configuration. Using a series-parallel connection, 3 batteries can be connected in series and 3 can be connected in parallel resulting in a 45V 15A configuration.