• Best of luck to the class of 2024 for their HSC exams. You got this!
    Let us know your thoughts on the HSC exams here
  • YOU can help the next generation of students in the community!
    Share your trial papers and notes on our Notes & Resources page
MedVision ad

who answered every question? (1 Viewer)

fush

Member
Joined
Feb 11, 2004
Messages
441
Location
Sydney
Gender
Male
HSC
2004
yea i finshed ti all, i had bout 15 mins spare, cheked a bit but still missed stupid mistakes
 

budj

Member
Joined
Feb 17, 2004
Messages
268
Gender
Undisclosed
HSC
2004
I said that commutators not connected toexternal circuit, rotor coils were not connected to split ring commutator, conducting brushes were made out of copper an not carbon (graphite), and that the armature was positioned such that it couldn;t rotate
 

smexy

New Member
Joined
Feb 11, 2004
Messages
7
yea i put that friction would cause sparks from the brushes, the coil was wound in clockwise and anticlockwise directions so it would rotate half way and then go back and that the motor had no power supply
 

senso

Left BOS 11/04
Joined
Nov 29, 2003
Messages
207
Gender
Undisclosed
HSC
N/A
Answered everything, and should get some marks for it. But i know i won't get full marks in the big mark questions.
 

gordo

Resident Jew
Joined
Feb 5, 2004
Messages
2,352
Location
bondi, sydney
Gender
Male
HSC
2004
the coil was wrapped around the armature in two ooposite directions
the coil was not connected to the commutator
and there was no power supply
 

vladimir

New Member
Joined
Aug 5, 2004
Messages
6
chriscity1 said:
hey maybe your right buddy. No arguments from me. I also said that the magnets would produce too weak a field for the number of turns (only 50) - needs to be more like 500 I thought.
i reckon the magnets and number of coils would have been enough, i made a crappy little motor with like 10 turns copper and a magnet i found lying around my house and it worked fine. i just put no power source, coils not joined to commutator and coils wound around wrong axis so the forces on different sides would cancel each other out
 

mojako

Active Member
Joined
Mar 27, 2004
Messages
1,333
Gender
Male
HSC
2004
the 2 magnets arent in the same horizontal plane
one is on a raised platform, the other one is on the desk
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top