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Flashcards in Magnetism Deck (18)
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1

Like poles ______________; Unlike poles _________.

Repel; Attract

2

Outside the magnet, a magnetic field runs _________ to ______________.

North to South

3

Inside the magnet, a magnetic field runs _____________ to ______________.

South to North

4

The pathways in a magnetic field always form ______________ _____________.

complete loops
(they do not start and end)

5

All magnetic fields are produced by what?

the motion of an electric charge

6

Billions of atoms all aligned magnetically

A Domain

7

When all the domains are lined up, what do we get?

A magnet

8

T/F: Magnets are permanent.

False. Impact and manipulation can cause the atoms to become disorganized

9

What rule can we use to determine the direction of the current through a wire?

Right-Hand Rule: Imagine your hand around the wire, fingers circling the wire in the same direction as the magnetic field. Extend your thumb and it points to the direction of the current.

10

These use superconducting coils to produce extremely strong magnets.

Electromagnets

11

A magnetic field will create a force that is _____________ to the field and the motion of the charge.

Perpendicular

12

A magnetic field produces electricity

Electromagnetic Induction

13

What has to occur between a loop and a magnet in order for induction to occur?

Relative Motion

14

The faster the relative motion between a loop and a magnet, the more ___________ is created.

Current

15

The amount of current produced in induction depends on what two things?

How fast the motion takes place
How many loops there are

16

A machine that moves the coil back and forth over the magnet (rotating the coil in a stationery magnetic field), producing electric current

Generator

17

A generator converts ____________ energy into ______________ energy;
A motor converts ______________ energy into __________________ energy.

Mechanical; Electrical
Electrical; Mechanical

18

What three things are required to produce alternating current?

A magnetic field
A Conductor (loop/coil)
Relative Motion
A