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Flashcards in Magnets Deck (28)
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1

If a material has high permeability, it is easy or hard to magnetize?

Easy

2

What device can be use to detect magnetism?

Compass

3

A set of Christmas lights designed so that if on bulb burns out they all will burn out would be an example of a ______ circuit

Series

4

If a material has high retentivity, is it easy or hard to demagnetize?

Hard

5

In _____ Field Theory of Electromagnetic Radiation, force is proportional to the product of the magnetic pole strengths divided by the square of the distance between them

Maxwell's

6

If two like poles of a magnet are put together, they will be

Repelled

7

_______ are typically produced by charging them in a field of an electromagnet

Temporary magnets

8

3 metals used to make "alnico"

Aluminum
Nicole
Cobalt

9

The geographic North Pole is a magnetic ______ pole

South

10

S.I. Unit of magnetic field strength is the _____

Tesla

11

Materials that are highly attracted to a magnet are called:

Ferromagnetic

12

In what direction do magnetic flux lines travel in space

North to South

13

Give 2 examples of magnetic materials

Iron
Cobalt

14

Give 2 examples of non magnetic materials

Wood
Plastic

15

Equation for Ohm's Law

V=IR

16

Never changes in a series?

Amps

17

Never changes in a parallel circuit?

Volts

18

Difficult to detect and measure: mass is heavy, energy is seen, and electricity creates shocks, but creates an invisible field

Magnetism

19

Any ____ particle in motion can create a magnetic field

Charged

20

Electrons circle a nucleus either clockwise or counter clockwise

Electron spin

21

Lines of a magnetic field are always closed __1__ and are __2__ or __3__

1. Loops
2. Bipolar
3. Dipolar

22

Small magnet created by electron orbit

Magnetic dipole

23

Accumulation of many atomic magnets with dipoles aligned

Magnetic domain

24

Flux lines traveling in the opposite direction will __1__, and flux lines traveling in the same direction will __2__.

1. Attract
2. Repel

25

Nonmagnetic, cannot be magnetized

Diamagnetic

26

Between feromagnetic and nonmagnetic

Paramagnetic
EX: Platinum

27

Ability to retain magnetization

Retentivity

28

Ferromagnetic material can be made magnetic by

Induction