i was hoping it would high 70s ((((My teacher said that low 80s is band 6 cutoff
i was hoping it would high 70s ((((My teacher said that low 80s is band 6 cutoff
dont need a current tho so it makes the brush thing kinda redundantYou don’t need brushes in an AC motor if you’re talking about question 2. You do need a stator coil
Yeah you don't apply the current to the rotor. It's induced. - carbon brushes can be fitted anywhere e.g electrical contact but current is never supplied directly to rotorYou don’t need brushes in an AC motor if you’re talking about question 2. You do need a stator coil
Yes, but the key word was applied- there was no current applied, only induced. Applied implies an electrical contact.Nah its A.
The operation of AC induction motor gives idea of what components are needed.
The operation of AC induction motor is different to regular DC motor.
You have 3 pairs of stator coils in a stator that are attached to different phases of an AC supply. Hence the stator coils will produce a perceived rotating magnetic field when AC current flows through them. There is a rotor inside the stator that experiences changing flux due to the rotating magnetic field. This induces a current in the rods of the rotor to oppose the changing flux. Hence the induced current will produce a magnetic field that opposes the rotating magnetic field and thus produces a magnetic force on the rotor to rotate with the rotating magnetic field to maintain constant flux. So the rotor is rotated through the application of electromagnetic induction.
]
nah they're saying it's D. which i'm 95% sure it is. there is no current "APPLIED" to the rotorSounds like we all agree it was brushes
thank god, im w/ u on this onenah they're saying it's D. which i'm 95% sure it is. there is no current "APPLIED" to the rotor
Maybe its just one of those particularly saucy questions that end up having two correct answersI went for brushes as well. Seems like there's a division between A and D though.
Particles in Y had a lower max kinetic energy than Xwhat was the answer to the photoelectric effect MC?
I said this too - some dude on HSC discussion group says its the other way aroundParticles in Y had a lower max kinetic energy than X
The emf graph was being produced by a DC motoralso what was the answer for the emf graph multi?
Wouldn’t worry about the discussion groupI said this too - some dude on HSC discussion group says its the other way around
Oh sorry I meant question 19 with the rotating conductor at a constant angular velocityThe emf graph was being produced by a DC motor
Exactly!Wouldn’t worry about the discussion group