ch 2 Flashcards
The ? in an electrical circuit is the electromotive force of the circuit.
voltage
If the voltage of a DC circuit is 24 volts, and the resistance of the circuit is 10 ohms, what is the amount of current present in the circuit?
2.4 A
For current to be present in electrical circuits, the circuit has to be ? .
complete
Which of the following is included in the overall opposition to current in an AC circuit?
Inductive reactance
Capacitive reactance
Resistance
If an electrical circuit is not complete, there will be no current in the circuit.
true
The greater the resistance in a circuit, the ? the current present in the circuit.
lower
If a 2,500-watt heater is supplied by a 480-volt circuit, how much current is present in the circuit?
5.2 A
In a 60-cycle AC circuit, the voltage and current change amplitude and direction ? times per second.
120
In its simplest form, a capacitor is two conductors separated by insulation.
true
Kaufmann discovered that keeping the conductors of an AC circuit in close proximity to each other will keep the ? of the circuit low.
Impendance
Current in an AC circuit will take which of the following paths while attempting to return to the source?
All conductive paths
Equipment such as switchboards and panelboards installed in an electrical system must have adequate ? ratings to ensure that extensive damage to equipment will not result from a ground-fault or short-circuit condition.
short-circuit current
Fuses and circuit breakers are required to be marked with all but which of the following ratings?
resistance
The highest current at rated voltage that a device is identified to interrupt under standard test conditions best defines which of the following?
Interrupting rating
The ? of an electrical system is the maximum current a system is capable of delivering at any point on the wiring installation.
available fault current