Magnetism

Question 1

AC Generator

Answer 1

produces alternating potential difference, also known as an alternator

Question 2

DC Generator

Answer 2

produces a varying potential difference, also known as a dynamo

Question 3

Electromagnet

Answer 3

a solenoid with an iron core

Question 4

Electromagnetic Induction

Answer 4

when current flows throw a wire held in magnetic filed, a force is created that moves the wire

Question 5

Fleming’s Left Hand Rule

Answer 5

a rule that gives the direction of the force on a current-carrying wire in a magnetic field according to the directions of the current and the field

Question 6

Induced Magnetism

Answer 6

a material that becomes a magnetic when it is placed in a magnetic field and always causes a force of attraction, but when removed from the magnetic field it loses most or all of its magnetism quickly

Question 7

Magnetic Field

Answer 7

the region around a magnet where a force ats on another magnet or a magnetic material

Question 8

Magnetic Flux Density

Answer 8

the measure of strength of a magnetic field, measured in Tesla

Question 9

Motor Effect

Answer 9

when a current is passe4d along a wire in a magnetic filed, and the wire is not parallel to the lines of the magnetic field, a force is exerted on the wire by the magnetic field

Question 10

Permanent Magnet

Answer 10

a magnet that produces its own magnetic field

Question 11

Poles

Answer 11

the places on a magnet where magnetic forces are strongest

Question 12

Solenoid

Answer 12

scientific name for coil wound into a tightly packed helix

Question 13

Split-Ring Commutator

Answer 13

metal contacts on the coil of a direct current motor that connects the rotating coil continuously to its electrical power supply