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RadPhysics > Electromagnetism > Flashcards

Electromagnetism Flashcards

1
Q

Static distribution of charges produces ________

A

Electric field

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2
Q

Change in motion produces _______

A

Magnetic field

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3
Q

Example of charges in motion

A

Electric current

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4
Q

Convinced that unification of the forces in nature. Electricity and magnetism were related.

A

Hans Christian Oersted

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5
Q

Permanent magnet is equivalent in its magnetic action to a coil of wire carrying a current

A

Solenoid

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6
Q

Alignment of the molecules with an external magnetic field

A

Magnetization

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7
Q

Each molecule in permanent magnet has a _______

A

Closed-current loop (north to south)

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8
Q

He described the forces initiated by electric charges or magnetism as a disturbance in space

A

Michael Faraday

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9
Q

Forces initiated by electric charges or magnetism as a disturbance in space

A

Field

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10
Q

Magnitude of the induced current depends on four factors:

A

Strength of magnetic field
Velocity of magnetic field
Angle of conductor
Number of turns in the conductor

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11
Q

Faraday built the ff:

A

Generator, motor, transformer

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12
Q

Change mechanical energy to electrical energy

A

Generator

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13
Q

Converts electrical energy into motion

A

Motor

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14
Q

Efficiently raise or lower AC voltages

A

Transformer

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15
Q

“The induced current in the coil produces a magnetic field to oppose in magnetic field which produced it”

A

Lenz law

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16
Q

According to James Clerk Maxwell

A

Changing magnetic field can make electric field, vice versa.

17
Q

Fluxus

A

Flow

18
Q

Fluere

A

To flow

19
Q

Space around a current flowing through a piece of conductor

A

Magnetic flux

20
Q

SI unit of Magnetic flux

A

weber (Wb)

21
Q

Arranging wire in a coil and running a current through produces a magnetic field that looks a bar magnet

A

Electromagnet

22
Q

Putting a real magnet inside, can shove the magnet back and forth

A

Solenoid

23
Q

Produced when an electric current flows through a coil of wire

A

Magnetic field

24
Q

Current-carrying coil of wire wrapped around an iron core

A

Electromagnet

25
Q

Electromagnet can be made stronger by:

A

Wrapping the coil around an iron core
Adding more turns
Increasing the current flowing through the coil

26
Q

One of the four fundamental interactions

A

Electromagnetism or electromagnetic force

RadPhysics (6 decks)

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