Flashcards in Magnets Deck (28)
Loading flashcards...
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
