Magnetism

Question 0

What is the rule for magnetic fields around wire?

Answer 0

The right hand rule applies thumb in the direction flow fingers rotation indicates flow

Question 1

What does the term permeability mean

Answer 1

Permeability is the ability of a material to concentrate lines of force

Question 2

The amount of voltage induced in a conductor depends upon:

Answer 2

Speed at wich the magnetic lines are cut. Intersecting angle. Strength of magnetic field and the number of conductors moving through the magnetic field

Question 3

Once the flux lines have grown to full capacity that is called:

Answer 3

Coil saturation

Question 4

The magnetic field becomes stationary quickly. How fast?

Answer 4

5-35 milliseconds

Question 5

Three characteristics of direction of magnetic flux lines are:

Answer 5

Direction from north to south poles
Take the shortest path
Repel when flux lines are similar

Question 6

3 factors that affect strength of a electromagnet are:

Answer 6

Number of turns of wire in coil
Voltage applied
Type of core material

Question 7

A electromagnetic device that draws an iron core to it’s centre is called a:

Answer 7

Solenoid

Question 8

Motor principle states that

Answer 8

A current carrying conductor within a magnetic field will move a area of weaker magnetic field

Question 9

4 factors that determine amount of voltage produced in conductor are:

Answer 9

Speed witch magnetic lines are cut
Angle of conductor threw flux lines
Magnetic fields strength
Number of conductors

Question 10

Self induction can be stated as?

Answer 10

Process of making voltage in a coil.

The collapse of the magnetic field results in self induction