A watt is the power that gives rise to the production of energy at the rate of __________.
Answer(s): D
The watt is the unit of power in electrical work. It is defined as the production of energy at the rate of one joule per second (per second is the basis for all electrical work).
The Greek letter phi () is used to __________.
Answer(s): B
The Greek alphabet is used almost in its entirety in the electrical field to represent various quantities and effects. The Greek letter phi () is familiar if you have been looking at three-phase power. It is used to represent the phases of electrical power.
A parallel circuit with resistors of 10 ohms, 10 ohms, and 5 ohms has a total resistance of __________.
Total resistance of a parallel circuit can be found two ways: by using the reciprocal formula or by using the product of two resistors divided by the sum of the two resistors divided by the sum of the two and then using it again to obtain the final answer in the case of three in parallel. In this case the two 10-ohm resistors will reduce to an equivalent of 5 ohms. This leaves, then, two 5-ohm resistors in parallel, which reduce to 2.5 or half of the value of one.
Which of these is a symbol for a fuse?
The symbols shown are for the resistor, the fuse, and the capacitor, as well as for a lamp or light bulb. The one for the fuse is shown as in B.
How much voltage has a typical home outlet?
Answer(s): A
A typical residential electrical outlet has 120 volts.
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