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Questions and Answers
What is the unit of measurement for electric charge?
What happens when opposite charges meet?
What is the purpose of grounding in electrical systems?
What is the unit of measurement for electric power?
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What type of circuit has components connected one after the other?
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What is the study of the flow of electric charge in devices and systems?
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What is the opposition to current flow?
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What is the ratio of output power to input power in a system?
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Study Notes
Fundamentals of Electricity
 Electric Charge: A fundamental property of matter, measured in coulombs (C)

Positive and Negative Charges:
 Like charges repel each other
 Opposite charges attract each other
 Electric Current: Flow of electric charge, measured in amperes (A)
 Electric Potential: Potential difference between two points, measured in volts (V)
 Resistance: Opposition to current flow, measured in ohms (Î©)
Electric Circuits

Series Circuit: Components connected one after the other
 Current is the same throughout the circuit
 Voltage is divided among components

Parallel Circuit: Components connected between the same two points
 Voltage is the same across each component
 Current is divided among components
 Short Circuit: Unintended path for electric current, often causing damage
Electric Power and Energy
 Power: Rate of energy transfer, measured in watts (W)
 Energy: Capacity to do work, measured in joules (J)
 Efficiency: Ratio of output power to input power, expressed as a percentage
Electric Safety
 Shock Hazards: Electric shock can cause injury or death
 Grounding: Connecting an electric circuit to the earth to prevent shock
 Insulation: Protecting conductors with nonconductive materials to prevent shock
Applications of Electricity
 Electrical Engineering: Design, development, and application of electrical systems
 Electronics: Study of the flow of electric charge in devices and systems
 Electrical Power Distribution: Generation, transmission, and distribution of electric power
Fundamentals of Electricity
 Electric charge is a fundamental property of matter, measured in coulombs (C).
 Like charges (positivepositive or negativenegative) repel each other, while opposite charges (positivenegative) attract each other.
 Electric current is the flow of electric charge, measured in amperes (A).
 Electric potential is the potential difference between two points, measured in volts (V).
 Resistance is the opposition to current flow, measured in ohms (Î©).
Electric Circuits
 In a series circuit, components are connected one after the other, resulting in the same current throughout the circuit and voltage divided among components.
 In a parallel circuit, components are connected between the same two points, resulting in the same voltage across each component and current divided among components.
 A short circuit is an unintended path for electric current, often causing damage.
Electric Power and Energy
 Electric power is the rate of energy transfer, measured in watts (W).
 Energy is the capacity to do work, measured in joules (J).
 Efficiency is the ratio of output power to input power, expressed as a percentage.
Electric Safety
 Electric shock can cause injury or death, making shock hazards a significant concern.
 Grounding an electric circuit to the earth helps prevent shock.
 Insulation involves protecting conductors with nonconductive materials to prevent shock.
Applications of Electricity
 Electrical engineering involves the design, development, and application of electrical systems.
 Electronics is the study of the flow of electric charge in devices and systems.
 Electrical power distribution involves the generation, transmission, and distribution of electric power.
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Description
Test your understanding of electric charge, current, potential, and resistance, as well as series and parallel circuits. Learn the basics of electricity and how it works.