Questions and Answers
What is Voltage?
What is Voltage Drop?
A decrease in voltage along a conductor through which current is flowing
What is Current?
A flow of electricity through a conductor
What is Resistance?
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What is Hot Resistance?
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What is a Cable Tray?
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What is Reactance?
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What is Impedance?
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What is Inductance?
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What is Capacitance?
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What is a Volt?
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What is an Ampere?
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What is a Watt?
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What is an Ohm?
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What is a Kilowatt-hour (Kwh)?
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What is Hertz?
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What is Reactive Current?
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What is Primary Current?
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What is a Panelboard?
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What is a Demand Charge?
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What is a Demand Interval?
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What is a Sheddable Load?
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What is Single Phase Service?
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What is a Grounded System?
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What is a Circular Mil?
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What is AWG (American Wire Gauge)?
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What is a Series Circuit?
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What is a Parallel Circuit?
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What is a Short Circuit?
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What is a Phase Angle?
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Study Notes
Key Electrical Concepts
- Voltage: Represents electrical pressure; energy drawn from a source that facilitates electricity flow in a circuit.
- Voltage Drop: Refers to a reduction in voltage along a conductor experiencing current flow.
- Current: The movement of electricity through a conductor, measured in amperes.
- Resistance: An element opposing the flow of electrical current; measured in ohms, quantifying friction in the electrical circuit.
- Hot Resistance: The maximum allowable resistance without surpassing the wattage limit.
Electrical Components and Measurements
- Cable Tray: A system for organizing cable arrangements, particularly in drop ceilings.
- Reactance: The hindrance to electric current caused by inductance and capacitance, distinct from resistance.
- Impedance: A resistor's opposition to AC circuits, measured in ohms, combining resistance, inductance, and capacitance.
- Inductance: The property of an electrical circuit that generates an electromotive force opposing current changes.
- Capacitance: The capability of a conductor to hold electrical energy in separate charges.
Units of Measurement
- Volt: Denotes electrical potential difference; a volt is the difference that allows a current of 1 ampere to dissipate 1 watt.
- Ampere: The foundational unit for measuring electric current.
- Watt: The power measurement unit equivalent to one joule per second.
- Ohm: Represents the resistance in a circuit that allows 1 ampere to flow with a voltage of 1 volt.
- Kilowatt-hour (KWh): Measurement for electrical energy equivalent to a kilowatt of power used for one hour.
- Hertz: The unit measuring frequency of alternating current.
A/C Circuit Concepts
- Reactive Current: The current in AC circuits not responsible for power production, perpendicular to voltage.
- Primary Current: Current flowing through the initial coil of a transformer.
Electrical Systems and Charges
- Panelboard: A unit featuring buses and overcurrent devices, assembled in a single panel for the control of electrical circuits.
- Demand Charge: A fee linked to the maximum energy usage observed during a billing cycle.
- Demand Interval: A time frame measured for energy consumption, often related to sliding window billing methods.
- Sheddable Load: Electrical loads that can be temporarily turned off without affecting processes, e.g., heating and air conditioning.
Circuit Configurations
- Single Phase Service: Electric power distribution system for residential use, mainly for lighting and heating, featuring synchronous voltage.
- Series Circuit: A configuration where components are linked in a single path, typically influencing current flow equivalently.
- Parallel Circuit: A circuit design allowing current to split into multiple paths, then recombine, creating alternate pathways for flow.
- Short Circuit: An unintended connection between circuit components leading to excessive current flow.
Other Electrical Terminology
- Grounded System: A system designed for safety and device protection by grounding potential faults.
- Circular Mil: A measurement for the cross-sectional area of wires, emphasizing wire thickness in calculations.
- AWG (American Wire Gauge): A standardized system for sizing round cross-section electrical conductors, predominantly used in the U.S.
Advanced Concepts
- Phase Angle: The degree measure indicating the relation between voltage and current in a circuit, significant in AC analysis.
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Description
This quiz features key electrical terms and their definitions, including concepts like voltage, current, and resistance. Use these flashcards to test your knowledge and understanding of fundamental electrical concepts essential for students and professionals alike.