Recent content by LordBerkley

Thank you for the reply, but is there a way you can show that graphically? I've attached a diagram of why I think using the right hand rule the solenoids would repel if that helps.

Can anyone help me understand why two coaxial solenoids separated by a distance x, with current flowing in the same direction in each solenoid, would be attracted to each other using the right hand rule? Im sure they would be attracted to one another (with the current flowing in the same...

Forgot to mention, I know the size of solenoids and the flowing current so I could calculate the magnetic field size to use in the bar magnet equation.

I have been asked to calculate the attraction between two solenoids that are positioned in 'series' N-S N-S and have a space 'x' between them. I tried to approximate the attraction between them by using the equation for attraction between cylinderical bar magnets: F=\left[\frac {B_0^2...

If I have a solenoid in the shape of a toroid (i.e. solenoid joined end to end) the magnetic field produced by the flow of charge will produce a concentrated magnetic field within the coil. How would I go about calculating the size of the magnetic field outside of the coil due to magnetic...

Take the field to be generated by a long solenoid, with a coil diameter of 1m. Is there a specific equation to give the loss of magnetic stray field strength when passing through a material?

If I have a magnetic field of say 5 Tesla which is 3m from a concrete wall 0.25m thick how would I go about calculating the strength of the magnetic field on the other side of the wall? Any help/guidance much appreciated!

Hi, I'm having a major issue trying to work out where the resultant lorentz force might act when I have a wire coiled around a doughnut (toroid) shape. Am I right in saying that there will be a resultant lorentz force acting to crush the doughnut because there will be a slightly denser...

Is there a reason why a wire coil inside of an iron pipe wouldn't work as an electromagnet?

Yes, it makes sense now, it has to be T. Effectively if you make a cut into the case 1 rod it is apparent that at the cut, like case 2, the torque can only ever be T in the opposite direction. Thank you for your help, much appreciated!

For case 1 the torque in any section is equal to 2T? - still not sure :/ For case 2 the torque in any section is equal to T

It is a twisting torque. At one end of there is a torque, T, acting clockwise. At the other end there is a torque, T, acting anti clockwise. I assumed that the opposing torques would cancel out at the centre of the rod, but thinking about it with a FBD it doesn't work like that.

Well, I was thinking that at the centre of the rod the net torque would be zero. This is where I became a little confused. Does the shear double at this point or is there none at all? My instinct would say that the shear is doubled. However, because there is effectively no torque at this...

Hi, Can anyone explain what would be the maximum shear force experienced by a rod if equal and opposite torques (T) were applied at each end? In comparison to a rod that was fixed at one end and had a torque T applied at the other end would the maximum shear experienced by the rod be...