Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta
    • Thread Starter

    Name:  Magnetic fields.jpg
Views: 181
Size:  50.4 KB

    I have no idea how to do this question. Well, I have an idea but it doesn't seem to be giving me the right answer. I used the equation as shown above in the image but whichever value of theta I use, the answer doesn't look right.
    Theta is either 0 degress or 90 degrees in part (a), but I'm not sure what the question means by the "plane of the coil". Is this the face or the top edge?
    And what is the value for N? Is it just 1?

    Yeah N is one

    by plain of the coil it means the plain containing all the wires - the wires are supposed to be a flat square, they've drawn an isometric diagram which is why it looks slanty.

    The way I remember which angle to use as theta is that if the coil plain was perpendicular to the field the equation would just say BAN which is the maximum amount fo flux that could go through a coil with that area.

    the cos(theta) is just in there to scale the area A the flux can pass through... as the coil rotates the flux is presented with a smaller target till it gets to zero when the coil is edge on to the flux and presenting no area for the flux to pass through.

    cos (0) =1 and cos (90)=0
Submit reply
Turn on thread page Beta
Updated: January 20, 2017
Do you like carrot cake?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.