Answer ALL questions. Look for any feedback given if you get an answer incorrect. Keep choosing an answer until you get it correct. CORRECT or INCORRECT answers are indicated at the TOP of the page. A score is given at the TOP of the page when the exercise has been completed.
The electrical device shown here used electromagnetism to provide movement. What is this device called?
relay
electromagnet
solenoid
transformer
The generator shown here uses 'slip-rings'. What type of output will it produce when the handle is turned?
a Sinusoidal output
a Direct Current output
a 'half wave' AC output
a 'chopped' DC output
The generator shown here uses a 'commutator'. What type of output will it produce when the handle is turned?
a 'rising and falling' DC output
an AC output
a negative DC voltage
a steady DC output
What term is used to describe the 'multiple lines of force' indicated on the diagram of a small electromagnet shown here?
magnetic force
magnetic flux
magnetic field
none of the answers shown here
What is the primary effect of adding a soft iron core to an electromagnet - as shown in the diagram here?
it can work on AC and DC
it has stronger magnetism
it allows the electromagnet to run quieter
it reduces the amount of current used by the electromagnet
If the magnet in the generator shown here is rotated, what output voltage will be generated?
AC
DC
Polyphase
Pulsed DC
How many degrees separate the windings in a 3-phase AC generator?
360 degrees
90 degrees
120 degrees
230 degrees
Which direction will the conductor move if the following conditions were present ?
down
up
left
right
Which direction will the conductor move if the following conditions were present ?
up
down
left
right
Which direction will the conductor move if the following conditions were present ?
down
up
left
right
Which direction will the conductor move if the following conditions were present ?
up
down
left
right
What material are 'brushes' - used in AC and DC generators and motors made from?
copper
brass
carbon
rubber
What is the unit of measure for 'Magnetic Flux Density' ?