Magnetic Fields

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Magnetic Field Noun

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[mag-net-ik feeld]

Back

Magnetic Field

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The region surrounding a magnetic source where its magnetic force can be detected by other magnetic materials or moving charges.

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Example: This diagram shows the invisible magnetic field around a bar magnet. The lines with arrows represent the direction of the magnetic force, flowing from the North pole (N) to the South pole (S).

Front

Tesla (T) Noun

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[tes-luh]

Back

Tesla (T)

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The SI unit for magnetic flux density, which quantifies the strength of a magnetic field at a specific point.

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Example: This diagram shows that a Tesla (T) is a measure of magnetic field strength (B), which is related to the force (F) on a wire with electric current (i).

Front

Magnetic Poles Noun

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[mag-net-ik pohls]

Back

Magnetic Poles

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The two ends of a magnet, designated North and South, where the external magnetic field is at its strongest.

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Example: This diagram shows a bar magnet with its North (N) and South (S) poles, and the magnetic field lines flowing from North to South.

Front

Magnetic Field Lines Noun

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[mag-net-ik feeld lynes]

Back

Magnetic Field Lines

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Imaginary lines used to represent the direction and strength of a magnetic field, pointing from the north to south pole.

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Example: This diagram shows a bar magnet with its North (N) and South (S) poles. The lines with arrows represent the invisible magnetic field, showing the path from North to South.

Front

Magnetic Flux Noun

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[mag-net-ik fluhks]

Back

Magnetic Flux

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A measurement of the total magnetic field that passes perpendicularly through a specified area, often represented by field lines.

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Example: This diagram shows how an electric current (I) in a wire loop creates a magnetic field. Magnetic flux is the measure of how many magnetic field lines (blue) pass through the area inside the loop.

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Weber (Wb) Noun

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[web-er]

Back

Weber (Wb)

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The standard international (SI) unit of measurement for magnetic flux, representing the total magnetic field passing through an area.

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Example: This diagram shows that as a magnet moves away from a wire loop, the magnetic flux (measured in Webers) through the loop changes, inducing an electric current.

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Electromagnetism Noun

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[uh-lek-troh-mag-nuh-tiz-uhm]

Back

Electromagnetism

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The fundamental physical interaction between electric currents and magnetic fields, where moving charges create magnetic effects and vice versa.

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Example: This diagram shows that when electricity flows through a coiled wire (an electromagnet), it creates a magnetic field around it, shown by the dotted lines.

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Solenoid Noun

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[soh-luh-noid]

Back

Solenoid

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A coil of wire with many turns that generates a strong, uniform magnetic field within its core when carrying an electric current.

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Example: A solenoid is a coil of wire. When electric current flows through the wire loops, it creates a magnetic field with north and south poles.

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Permeability of free space (μ₀) Noun

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[per-mee-uh-bil-i-tee of free spayss]

Back

Permeability of free space (μ₀)

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A physical constant representing the ability of a vacuum to support the formation and propagation of a magnetic field.

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Example: This diagram shows an electric current flowing through a coil of wire, creating a magnetic field. The permeability of free space (μ₀) is a constant that measures how easily this magnetic field forms in a vacuum.

Front

Motor Effect Noun

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[moh-ter uh-fekt]

Back

Motor Effect

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The phenomenon where a force is exerted on a current-carrying conductor when it is placed within an external magnetic field.

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Example: When a wire carrying an electric current is placed in a magnetic field, it experiences a force, causing it to move.