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Physics > 1141 Definitions > Flashcards

1141 Definitions Flashcards

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1
Q

iron ore with natural magnetic properties

A

magnetite

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2
Q

metals strongly attracted by magnets

A

ferromagnetic

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3
Q

iron nickel cobalt

A

ferromagnetic metals

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4
Q

metals weakly attracted by magets

A

paramagnetic

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5
Q

aluminum magnesium

A

paramagnetic metals

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6
Q

strong magnetic alloy of aluminum, nickel, and cobalt

A

alnico

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7
Q

metals slightly repelled by magnets

A

diamagnetic

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8
Q

gold silver copper

A

diamagnetic metals

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9
Q

forces that act at a distance

A

gravity, static electricity, magnetism, and nuclear forces

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10
Q

wrote the first scientific study of magnetism

A

William Gilbert

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11
Q

Dip compass

A

not straight lines. 0 is equator. 90 is pole

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12
Q

Magnetic domains

A

millions of magnetic atoms aligned in the same way

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13
Q

the space around Earth where magnetic forces can be detected

A

magnetosphere

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14
Q

a field:

A

a region in space in which a body’s magnetic, electric, or gravitational force exerts its influence

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15
Q

an electromagnet

A

a solenoid with an iron core

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16
Q

an electric motor

A

a device that converts electric current to mechanical energy

17
Q

the production of electricity by a changing magnetic field and the production of magnetism by a moving electric current

A

Electromagnetic induction

18
Q

an electric generator

A

a device that converts mechanical energy to electric energy

19
Q

invented the solenoid

A

Andre Ampere

20
Q

made improved, stronger electromagnets

A

Joseph Henry

21
Q

first demonstrated that electricity can generate a magnetic field

A

Hans Christian Oersted

22
Q

used electromagnets in inventing the telegraph

A

Samuel F. B. Morse

23
Q

developed magnetic field theory

A

Michael Faraday

24
Q

Magnetic flux density (strength of magnetic field)

A

(number of loops x current in amperes) / (length of the solenoid in meters)

Physics (22 decks)

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