| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.32 |
| Score | 0% | 66% |
The voltage output of a transformer primarily depends on which of the following?
the conductor used for the wire in the coils |
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the diameter of the coils |
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the diameter of the wire in the coils |
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the number of turns in the wire of the coils |
A transformer utilizes an inductor to increase or decrease the voltage in a circuit. AC flowing in a coil wrapped around an iron core magnetizes the core causing it to produce a magnetic field. This magnetic field generates a voltage in a nearby coil of wire and, depending on the number of turns in the wire of the primary (source) and secondary coils and their proximity, voltage is induced in the secondary coil.
The rate of flow of electrons per unit time is which of the following?
voltage |
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conductance |
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resistance |
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current |
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.
Longer the electrical wires mean _______________ voltage drop.
complete |
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diminishing |
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greater |
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lesser |
Electrical wires have a certain amount of resistance per foot. A longer wire means more resistance and a greater voltage drop.
Which of the following is a difference between a circuit breaker and a fuse?
all of these |
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a fuse is cheaper than a circuit breaker |
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a circuit breaker can be reused |
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a fuse responds more quickly than a circuit breaker |
Like fuses, circuit breakers stop current flow once it reaches a certain amount. They have the advantage of being reusable (fuses must be replaced when "blown") but respond more slowly to current surges and are more expensive than fuses.
| 18V 30A | |
| 6V 60A | |
| 36V 10A | |
| 18 |
Connecting the 6 batteries in series multiplies their voltage while keeping their current the same yielding a 36V 10A configuration. Connecting the 6 batteries in parallel multiplies their current while keeping their voltage the same yielding a 6V 60A configuration. Using a series-parallel connection, 3 batteries can be connected in series and 3 can be connected in parallel resulting in a 18V 30A configuration.