Science Exam Semester 2 2025 - electricity

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26 Terms

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Electric Circuit
A closed path that allows electric current to flow.
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Open Circuit
The current stops flowing.
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Voltage
The amount of energy that electrons have and how it pushes electrons through a circuit.
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Unit for Voltage

Volts (V)

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Current
The flow of electric charge through a circuit.
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Unit for Current
Amperes (A).
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Resistance
How difficult or it is for current to flow
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Unit for Resistance
Ohms (Ω).
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Ohm's Law
V = I × R.
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Conductor
A material that allows electricity to flow easily.
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Examples of Conductors
Copper, aluminum, silver, gold.
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Insulator
A material that resists the flow of electric current.
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Examples of Insulators
Plastic, rubber, glass, wood.
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Series Circuit
A circuit where components are connected one after another in a single path.
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Effect of Break in Series Circuit
The whole circuit stops working.
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Parallel Circuit
A circuit where components are connected in multiple paths.
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Effect of Break in Parallel Circuit
The other paths keep working.
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Magnet
An object that produces a magnetic field and attracts materials like iron, nickel, and cobalt.
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Poles of a Magnet
North and South poles.
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Like Poles Interaction
They repel.
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Opposite Poles Interaction
They attract.
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Magnetic Field
The region around a magnet where magnetic forces act.
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Direction of Magnetic Field Lines
From the North pole to the South pole.
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Electromagnetism
The relationship between electricity and magnetism — when electric current produces a magnetic field.
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Electromagnet
A magnet made by passing electric current through a wire coil wrapped around an iron core.
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Ways to Strengthen Electromagnet
Increase current, add more coil turns, or use a larger iron core.