B field Definition and 160 Threads

Homework Statement A 119 cm wire carries a current of 1.5 A. The wire is formed into a circular coil and placed in a B-field of intensity 1.9 T. 1) Find the maximum torque that can act on the loop. 2) How many turns must the coil have, so that the torque is maximized? Homework...

Ok, dumb question, I know. But it's been bugging me, and I can't find a straight answer anywhere, so here it goes: In a classical electromagnetic wave, where the electric field points upward, will the magentic field point AT me or AWAY from me? I've seen textbooks depict them both ways -...

Homework Statement The uniform 26.0 mT magnetic field in the figure points in the positive z-direction. An electron enters the region of magnetic field with a speed of 5.50E6 and at an angle of 30 deg. above the xy-plane. The problem defines the pitch to be the distance between the...

Homework Statement I want the force on a finite conducting wire that is perpendicular to an infinite wire. Can I do it with this: F = I_f \int{\frac{\mu_0 I_i}{2\pi r}}{dr} where I_f, I_i are the currents in the finite and infinite wires.

Homework Statement Consider a spin 1/2 particle placed in a magnetic field \vec{B_0} with components: B_x = \frac{1}{\sqrt{2}} B_0 B_y = 0 B_z = \frac{1}{\sqrt{2}} B_0 a) Calculate the matrix representing, in the {| + >, | - >} basis, the operator H, the Hamiltonian of the...

hey how would I go about calculating the B field of a bar magnet? I've already managed to calculate the electric field between two charged particles etc and draw that, but I just can't see where to start with this one as its not just a point at north and south but a whole load of atoms...

Hi, I have the following question on my problem sheet, and I just want to check that my answer to it is correct as I need to use the result in a later problem. If someone could confirm it is correct, or point out mistakes/erros that would be great. ======= Q. Derive the wave equation for E...

I just had a quick thing i wanted to clarify... The question was: If u have two horizontal parallel current carrying wires 196 cm apart, with the bottom wire carrying a current of 2.2 A to the west and the top 1.1 A to the west, what is the magnetic field at the point P? Point P being the...

Please tell me if this is right: A coil contains 100 turns of wire in a loop 15cm in diameter. The loop is placed between the poles of a large electromagnet B= 1.0 T, with the plane of the loop perpendicular to the field. If the magnetic field is steadily reduced from 1.0 T to 0 in 16...

A simple question. I though Maxwell said that : 1. The change of electric field generates magnetic field. 2. The change of Magnetic field generates Electric field. So, simple algorithm tells me there shall be a 90 degree of phase difference between the peaks of E field and B...