| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.45 |
| Score | 0% | 69% |
Current is the rate of flow of electrons per unit time and is measured in:
ohms |
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coulombs |
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amperes |
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volts |
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.
| 11.5 A | |
| 8.5 A | |
| 2.83 A | |
| 25.5 A |
Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.
Solved for current, I = \( \frac{V}{R} \) = \( \frac{595}{70} \) = 8.5 A
The volt is a unit of measurement for:
voltage |
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capacitance |
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current |
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power |
Voltage (V) is the electrical potential difference between two points. Electrons will flow as current from areas of high potential (concentration of electrons) to areas of low potential. Voltage and current are directly proportional in that the higher the voltage applied to a conductor the higher the current that will result.
Which of the following is the preferred method for splicing wires?
wrap in small gauge wire |
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wire crimps |
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screw-on connectors |
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soldering |
Splicing is permanently joining two wires together. Splicing can be done with screw-on connectors or wire crimps but the preferred method for splicing is soldering. Soldering takes the most effort but results in a connection that is electrically and mechanically identical to the original wire.
If an electrical circuit is interrupted, which of the following will result?
open circuit |
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short circuit |
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parallel 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.