Physics Examination Discussion

[Shandbagers]

I must say, this is probably the most difficult 3/4 physics exam, trial or VCAA, that I recall doing.


For sound people, for the question about the operating principles, don't velocity microphones and dynamic loudspeakers both use electromagnetic induction? I swear there were two answers to that multi choice question...

I was thinking the exact same thing but i opted for velocity ribbon but no real reason why,
Good luck for your 50 in englang tommorow Nick!

[SocialRhubarb]

For sound people, for the question about the operating principles, don't velocity microphones and dynamic loudspeakers both use electromagnetic induction? I swear there were two answers to that multi choice question...

A dynamic loudspeaker creates sound by passing current near a magnet to make it move, so it falls under 'electromagnetism', but a current is not induced, so it's not really 'induction'.

[lzxnl]

Ah. I must have confused those things with microphones.

Well even better that I didn't choose that option