Recent content by nawand

Thanks a lot! This makes me sure I understood it. "You learn only if you get right feedbacks".

Question a) The magnet field is pointed to the right, when you move the magnet, there will be a current created in the loop which is from a to b Since the field is decreasing, the induced current will replay the direction of current which is from a to b: (Counter-clockwise) (Apparently I had...

Homework Statement Use Lenz’s law to answer the following questions con- cerning the direction of induced currents. Express your answers in terms of the letter labels a and b in each part of Figure P31.22. (a) What is the direction of the induced current in the resistor R in Figure P31.22a when...

Great!. Indeed I have added it twice mv2/2 (This is my type fault). I was wondering about the energy was added in the left side Fb times L and which is likely the energy contribution of magnetic field. "Sleeping" = "Slipping" Thanks a lot!

You should probably integrate it over the whole volume since dFb = I * dsXB (cross product), then the Fb =I* ∫dsXB. In this case ds will be dv - a small volume which I assume the volume of cone will be. (not sure, but maybe lighten your solution). If you consider only ds (surface) then from a...

Homework Statement A rod of mass 0.720 kg and radius 6.00 cm rests on two parallel rails fig.1 that are the d=12.0 cm apart and L=45.0 cm long. The rod carries a current of I=48.0 A in the direction shown and rolls along the rails without sleeping. A uniform magnetic field of magnitude 0240 T...

Thanks

Homework Statement The first one has charge Q is at "-a" from origin the second is at "+3a" which is an unknown charge.What are the values for unknown charge if at the origin the net electric field they produce with magnitude 2Ke(Q/a2) Homework Equations Ke (Q/a2)i - Ke(q/9a2)=2Ke(Q/a2)i if...