| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.15 |
| Score | 0% | 63% |
You would measure the amount of current through a circuit with a(n):
ammeter |
|
battery |
|
potentiometer |
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voltmeter |
Current is the rate of flow of electrons per unit time and is measured in amperes (A). An ammeter is used to measure the electric current in a circuit.
The valence shell of n insulator is how full of electrons?
half full |
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more than half full |
|
less than half full |
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empty |
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.
An engineer who wants to document an electric circuit would create which of the following?
a layout |
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a matrix |
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a blueprint |
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a schematic |
A schematic is the proper name for a drawing of an electric or electronic circuit.
Resistance is opposition to which of the following?
current |
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voltage |
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conductance |
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impedance |
Resistance is opposition to the flow of current and is measured in ohms (Ω). One ohm is defined as the amount of resistance that will allow one ampere of current to flow if one volt of voltage is applied. As resistance increases, current decreases as resistance and current are inversely proportional.
The sum of the voltage drops across each resistor in a __________ circuit will equal the total voltage applied to the circuit.
series-parallel |
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parallel |
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series |
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closed |
A series circuit has only one path for current to flow. In a series circuit, current (I) is the same throughout the circuit and is equal to the total voltage (V) applied to the circuit divided by the total resistance (R) of the loads in the circuit. The sum of the voltage drops across each resistor in the circuit will equal the total voltage applied to the circuit.