Magnets

Question 1

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

Answer 1

Easy

Question 2

What device can be use to detect magnetism?

Answer 2

Compass

Question 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

Answer 3

Series

Question 4

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

Answer 4

Hard

Question 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

Answer 5

Maxwell’s

Question 6

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

Answer 6

Repelled

Question 7

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

Answer 7

Temporary magnets

Question 8

3 metals used to make “alnico”

Answer 8

Aluminum
Nicole
Cobalt

Question 9

The geographic North Pole is a magnetic ______ pole

Answer 9

South

Question 10

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

Answer 10

Tesla

Question 11

Materials that are highly attracted to a magnet are called:

Answer 11

Ferromagnetic

Question 12

In what direction do magnetic flux lines travel in space

Answer 12

North to South

Question 13

Give 2 examples of magnetic materials

Answer 13

Iron

Cobalt

Question 14

Give 2 examples of non magnetic materials

Answer 14

Wood

Plastic

Question 15

Equation for Ohm’s Law

Answer 15

V=IR

Question 16

Never changes in a series?

Answer 16

Amps

Question 17

Never changes in a parallel circuit?

Answer 17

Volts

Question 18

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

Answer 18

Magnetism

Question 19

Any ____ particle in motion can create a magnetic field

Answer 19

Charged

Question 20

Electrons circle a nucleus either clockwise or counter clockwise

Answer 20

Electron spin

Question 21

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

Answer 21

1. Loops
2. Bipolar
3. Dipolar

Question 22

Small magnet created by electron orbit

Answer 22

Magnetic dipole

Question 23

Accumulation of many atomic magnets with dipoles aligned

Answer 23

Magnetic domain

Question 24

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

Answer 24

1. Attract

2. Repel

Question 25

Nonmagnetic, cannot be magnetized

Answer 25

Diamagnetic

Question 26

Between feromagnetic and nonmagnetic

Answer 26

Paramagnetic

EX: Platinum

Question 27

Ability to retain magnetization

Answer 27

Retentivity

Question 28

Ferromagnetic material can be made magnetic by

Answer 28

Induction