That gay multiple choice question (1 Viewer)

[idontgetit]

The one about the application of conservation of energy in the same way as electromagnetic braking, in which every answer could be right. Everyone in my school is arguing over whether its c or d. I got d cause they both have eddy currents. What did everyone else do?

 

[derek_]

D - eddy current argument

 

[The Bograt]

I agree with derek

 

[Jezzabelle]

I agree with derek

induction motors, conservation energy, back emf...

induction cooktops dont work on conservation of energy, just faraday's law

 

[Kelvy]

Ok, we're all wrong then! lOl! Hey Laurie

 

[The Bograt]

induction motors, conservation energy, back emf...

induction cooktops dont work on conservation of energy, just faraday's law

Ah ok yeah you are right
Damn

 

[hughbj]

Everyone in my school is arguing over whether its c or d.

I had the same debate in my mind, I initially thought D and wrote it down quickly, but then crossed it out because I considered the induction to be MORE alike the principles in the wheel. Virtually it is the same thing. Still it was a difficult question.

 

[senso]

i thought it was the cooktop, D.

 

[Jezzabelle]

Ah ok yeah you are right
Damn

hehehe.. you know i changed that answer to induction motors from cooktops in the last minute of the exam when i was checking thru. i am cheering now

 

[Plebeian]

Conservation of energy is the basis of eddy currents, isn't it? I put D.

 

[idontgetit]

Faraday's Law is that a changing flux induces an emf... Which is true for d, but isn't it also true for eddy current breaking? The emf causes the eddy current doesn't it?

 

[mr EaZy]

yeah but so is induction motors, it produces a field also..........

 

[Jezzabelle]

you know wat?

i dont care... special relativity dudes, we cant travel into the past. forget it

 

[ShaunSmith]

i said D i believe, looks like i could of been wrong but i hope not!

 

[shazzam]

i dont care... special relativity dudes, we cant travel into the past. forget it

Well it's interesting to know the theory anyway.

PS. special relativity doesn't limit time travel, it aids the concept if anything

 

[ramanij]

why cant it be A. DC motors dat produces back emf which slows the rotor just like the wheel being slowed down in diagram

 

[pussy_cat]

i got D
cuz eddy currents are the cause of electromagnetic braking in trains, the diagram was a bit confusing but, it looked wierd. But hey...... who knows

 

[henry]

I thought it was the induction cooktop.

 

[sub]

it was D due to the eddy current argument as derek sed earlier

 

[def loto]

it was definatly D
the other 3 are all based on the motor effect