drinkwine732Posts: 20,418destroyer of motherfuckers
edited April 2013
But Jay...seriously....enough fucking around here.
Why do I keep getting all these electromagnetic field direction questions wrong? I'm using my right hand in the direction of the induced current and everything.
drinkwine732Posts: 20,418destroyer of motherfuckers
^#(^ oooooooh okay, I get it. The second that I want to talk some electromagnetism in this thread it becomes dead. It's all fun and games when we're talking football and stuff, but I need some physics help and I'm on my owwwwwnnnn. I get it. ^#(^
But Jay...seriously....enough fucking around here.
Why do I keep getting all these electromagnetic field direction questions wrong? I'm using my right hand in the direction of the induced current and everything.
Thumb is in the direction of the current and the fingers are in the direction of the magnetic field, yes?
drinkwine732Posts: 20,418destroyer of motherfuckers
Yeah, they are, I'm just trying to figure out how to picture everything. Usually they have such nice pretty pictures for me to follow but not today.
A point charge moving in a magnetic field of 1.24 Tesla experiences a force of 0.813·10-11 N. The velocity of the charge is perpendicular to the magnetic field. In this problem, we use the points of the compass and `into' and `out of' to indicate directions with respect to the page. If the magnetic field points south and the force points out of the page, then select True or False for the charge Q.
Q is negative, moving east Q is negative, moving north Q is negative, moving west Q is positive, moving west Q is positive, moving east
I think I'm getting something messed up in the difference between the charge and the current.
It stings so much to be struggling with technical work that isn't even related to my degree. :-w
Yeah, they are, I'm just trying to figure out how to picture everything. Usually they have such nice pretty pictures for me to follow but not today.
A point charge moving in a magnetic field of 1.24 Tesla experiences a force of 0.813·10-11 N. The velocity of the charge is perpendicular to the magnetic field. In this problem, we use the points of the compass and `into' and `out of' to indicate directions with respect to the page. If the magnetic field points south and the force points out of the page, then select True or False for the charge Q.
Q is negative, moving east Q is negative, moving north Q is negative, moving west Q is positive, moving west Q is positive, moving east
I think I'm getting something messed up in the difference between the charge and the current.
It stings so much to be struggling with technical work that isn't even related to my degree. :-w
I believe the thumb points in the negative direction, so if that were true...
False, negative current should be moving left False True False, positive current should be moving right True
That's what I thought, too. Turns out it's not correct.
Ironically, the answer is the exact opposite, excluding the second one since it obviously can't go north.
It's
True False False True False
No idea how that worked out. Is it cause the charge opposes the flux or something?
I guess the thumb is pointing towards positive then. Which I guess makes sense because the equation is F = qvB. If you make the charge q negative, v also has to be negative to keep the force in the same direction. Therefore, the velocity goes in the opposite direction of your thumb.
Comments
>won 4 super bowls in 9 seasons
>Giants have won 4 in their history
>yes, that's my QB.
>"offers football wisdom"
:-S Just one this time.
Why do I keep getting all these electromagnetic field direction questions wrong? I'm using my right hand in the direction of the induced current and everything.
A point charge moving in a magnetic field of 1.24 Tesla experiences a force of 0.813·10-11 N. The velocity of the charge is perpendicular to the magnetic field. In this problem, we use the points of the compass and `into' and `out of' to indicate directions with respect to the page. If the magnetic field points south and the force points out of the page, then select True or False for the charge Q.
Q is negative, moving east
Q is negative, moving north
Q is negative, moving west
Q is positive, moving west
Q is positive, moving east
I think I'm getting something messed up in the difference between the charge and the current.
It stings so much to be struggling with technical work that isn't even related to my degree. :-w
See which way fingers and thumb are pointing
See what end result is
False, negative current should be moving left
False
True
False, positive current should be moving right
True
there's your wisdom
Ironically, the answer is the exact opposite, excluding the second one since it obviously can't go north.
It's
True
False
False
True
False
No idea how that worked out. Is it cause the charge opposes the flux or something?
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