Chapter 7: Magnetism & Electromagnetism Flashcards

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0
Q

Magnetism

A

The force of attraction or repulsion of magnetic materials.

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1
Q

Magnet

A

Any material that attracts iron and materials that contain iron.

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2
Q

Magnetic Pole

A

The ends of a magnetic object, where the magnetic force is strongest.

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3
Q

Magnetic Force

A

A force produced when magnetic poles interact.

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4
Q

Magnetic Field

A

The region around a magnet where the magnetic force is exerted.

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5
Q

Magnetic Field Lines

A

Lines that map out the magnetic field around a magnet.

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6
Q

Compass

A

A device with a magnetized needle that can spin freely; a compass needle always points north.

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7
Q

Magnetic Declination

A

The angle between geographic north and the north to which a compass needle points.

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8
Q

Electromagnetism

A

The relationship between electricity and magnetism.

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9
Q

Solenoid

A

A coil of wire with a current.

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10
Q

Electromagnet

A

A magnet created by wrapping a coil of wire with a current running through it around a core of material that is easily magnetised.

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11
Q

Galvanometer

A

A device that uses an electromagnet to detect small amounts of current.

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12
Q

Electric Motor

A

A device that transforms electrical energy to mechanical energy.

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13
Q

Electromagnet Induction

A

The process of generating an electric current from the motion of a conductor through a magnetic field.

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14
Q

Direct Current

A

Current consisting of charges that flow in only one direction in a circuit.

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15
Q

Alternating Current

A

Current consisting of charges that move back and forth in a circuit.

16
Q

Generator

A

A device that transforms mechanical energy into electrical energy.

17
Q

Transformer

A

A device that increases or decreases voltage, which often consists of two separate coils of insulated wire wrapped around an iron core.