Chemistry, Physics

[Ghost Of Highbury]

its the direction of the magnetic field at THAT POINT . the reason i stress on the point is because the magnetic field is circular and the blue line is the tangent to that circle.

[The Golden Girl =D]

@A@di - i understood the question finally ..lol thx!!!!

[gaurav95]

its the direction of the magnetic field at THAT POINT . the reason i stress on the point is because the magnetic field is circular and the blue line is the tangent to that circle.

Thanks for all your explanations
I'd + rep for that
In the q above how did u determine the direction of magnetic field??
but as a i said can u give more e.g.s thx                 

[holtadit]

Thanks for all your explanations
I'd + rep for that
In the q above how did u determine the direction of magnetic field??
but as a i said can u give more e.g.s thx                 

The mag field always flows from North pole to South pole, so your index finger points from North towards the south pole.

[gaurav95]

The mag field always flows from North pole to South pole, so your index finger points from North towards the south pole.

I know that but where are the S and North poles and Examples pls

[holtadit]

I know that but where are the S and North poles and Examples pls

They will be shown

[Dibss]

The orange line indicates the magnetic field. As u can see it is in a circular form, Now, here u have to use the flemming's left hand rule.

However, as the magnetic field is in circular form u have to choose one point to apply the Left hand rule. The red point marken on the line T3-T4 is that point. (Note - the red point shudve been on the wire (T3-T4), it didnt come up in the image, sry abt that)

Okay, so at that point, the magnetic field is pointing in the direction of the blue arrow (consider it as a tangent to the circle)

The brown arro indicates the current.

If u arrange ur left hand in this form u will see the movement of the wire is towards the thick rigid wire as ur thumb points towards it.

hey A@di, is this by any chance the solution for m/j 08 q9? Are you sure that's the answer because i think i recognize the question and i distinctly remember my teacher giving me a completely different explanation and mentioning that it was a different concept... should i elaborate?

[holtadit]

hey A@di, is this by any chance the solution for m/j 08 q9? Are you sure that's the answer because i think i recognize the question and i distinctly remember my teacher giving me a completely different explanation and mentioning that it was a different concept... should i elaborate?

Please do.

[soualhi1]

@A@di: how do we know where to place our hand?

Cos I did the mistake of the force finger coming out of the page, but the current finger is the same, so which way do we know how to place our hand

[Dibss]

ok i'm attaching a picture of the notes my teacher made me jot down at the end of the question. When 2 parallel wires carry current tin the same direction the effect of the combined magnetic field results in a force of attraction. if directions are different --> force of repulsion. 9c) says there's a current going down both wires. the attachment shows combined field causing both wires to be attracted to each other. since thick rigid wire can't move, the flexible wire ends up moving toward thick wire T1-T2.

[holtadit]

ok i'm attaching a picture of the notes my teacher made me jot down at the end of the question. When 2 parallel wires carry current tin the same direction the effect of the combined magnetic field results in a force of attraction. if directions are different --> force of repulsion. 9c) says there's a current going down both wires. the attachment shows combined field causing both wires to be attracted to each other. since thick rigid wire can't move, the flexible wire ends up moving toward thick wire T1-T2.

Look at the picture. As the current is travelling downwards there is a south pole induced on both.


Wouldnt that cause repulsion ?

[Dibss]

@ari
hope the diagram helps...
although i'm not really an expert at explaining and could be making a mistake :/ could someone check this?

[Ghost Of Highbury]

Look at the picture. As the current is travelling downwards there is a south pole induced on both.


Wouldnt that cause repulsion ?

yes, i think so too. astar can check it.

[Dibss]

yes, i think so too.

yikess

astar can check it.

ok:]

[Fastal]

is this right?