| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.28 |
| Score | 0% | 66% |
You would measure the amount of resistance at a certain point in a circuit with a(n):
ammeter |
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ohmmeter |
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potentiometer |
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voltmeter |
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.
If an electrical circuit is interrupted, which of the following will result?
open circuit |
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parallel circuit |
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short 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.
In a series circuit, which of the following is the same across all branches of the circuit?
current |
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voltage |
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conductance |
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resistance |
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.
Current is the rate of flow of electrons per unit time and is measured in:
volts |
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amperes |
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ohms |
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coulombs |
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.
What is the voltage of most household electrical systems in the United States?
220V |
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60V |
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60Hz |
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110V |
Most households use electricity with a voltage of 110V.