Magnetism

What are the lines for a magnetic field called?

• Magnetic Flux lines

• Magnetic lines

• Field lines

• Magnetic field lines

If the flux lines are closer the flux density is?

• Lower

• Higher

• Weaker

• Inducted

True or False, If the flux density is high the weaker the magnetic field

• True

• False

Which part of an atom creates a magnetic effect?

• Neutron

• Proton

• Electron

What is the formula for magnetic flux density?

• $Magnetic\ flux\ density=\frac{magnetic\ flux}{area}$

• $Magnetic\ flux\ density=magnetic\ flux\times area$

• $Magnetic\ flux\ density=\frac{magnetic\ flux}{\pi}$

• $Magnetic\ flux\ density=\frac{area}{magnetic\ flux}$

What is the flux density in a rectangular core that is 8mm by 10mm if the flux is 4mWb?

• 45T

• 50T

• 49T

• 52T

if two conductors were placed together with magnetic fields going the opposite direction, they would?

• Explode

• Attract

• Repel

• Solenoid

If two conductors were placed together with magnetic fields in the same direction, they would?

• Repel

• Explode

• Solenoid

• Attract

A three phase cable contains how many conductors carrying current in the same direction?

• 1

• 2

• 3

• 4

True or False, If the current carrying conductor is coiled it creates a strong electromagnetic field

• True

• False