applications of electromagnetism and electromagnetic conduction

Question 1

An electric generator can produce an electric current by rotating __________ in a _____________

Answer 1

loops of wire, fixed magnetic field

Question 2

commutator rings are __________; the brushes are ____________

Answer 2

spinning; stationary

Question 3

current flow is ________ to electron flow

Answer 3

opposite

Question 4

when conductor is parallel to the field = ____________

Answer 4

no lines of flux are intersected, thus no current

Question 5

maximum current flow is when the conductor is _____________

Answer 5

at a right angle

Question 6

commutators help to change ________ to _________; used instead of ____

Answer 6

alternating, direct; slip rings

Question 7

the main difference between an electric motor and electric generator is that _________________ is supplied to the loop instead of _________________

Answer 7

an electric current; mechanical energy

Question 8

several fixed electromagnets arranged in pairs around the rotor

Answer 8

stator (fixed)

Question 9

located in the middle of the stators and is composed of an iron core surrounded by coils

Answer 9

rotor (rotating)

Question 10

Although this generator would be functional in theory, it is nowhere near efficient enough for electricity production. That’s why coils of wire are used instead of a single loop of wire. These coils of wire are called _________

Answer 10

armatures

Question 11

two main components of the induction motor

Answer 11

stator, rotor

Question 12

stator is _____, rotor is __________

Answer 12

fixed, rotating

Question 13

several fixed electromagnets arranged in pairs around the other main component of the induction motor

Answer 13

stator

Question 14

located in the middle of the other main component of the induction motor and is composed of an iron core surrounded by coils

Answer 14

rotor

Question 15

electrical generators convert ________ energy into ______ energy

Answer 15

mechanical, electrical

Question 16

electrical motors convert ________ energy into ______ energy

Answer 16

electrical, mechanical

Question 17

The transformer, does not change one form of energy into another. Rather changes _______________ into ____________________

Answer 17

current and electric potential; higher or lower intensities

Question 18

transformers operate based on ___________________ and therefore require

Answer 18

electromagnetic mutual induction, AC current

Question 19

A simple transformer has a primary winding connected to an AC source that generates an alternating (moving) magnetic field that that creates an induced current in the secondary coil

Answer 19

closed core transformer

Question 20

A more common design is to have both coils wrapped around a sing core of ferromagnetic material which traps the area of the primary magnetic field to just the general area where it induces the secondary current. Most used type because it is more efficient and induces the strongest possible current

Answer 20

shell type transformer

Question 21

A device that raises or lowers voltage in the primary circuit, depending on the setting chosen on the machine’s control panel for the kilovolt peak voltage (kVp)

Answer 21

auto transformer

Question 22

____________ would not be used for high voltage transformations

Answer 22

auto transformers

Question 23

auto transformers operate on the principle of ___________

Answer 23

self induction

Question 24

step up transformers _______; step down transformers ______

Answer 24

increase voltage, decrease voltage