help! I need help with this homework problem.
--A line of positive charge is formed into a semicircle of radius R=60.0 cm. The charge per unit length along the semicircle is described by the expression [lamb]= [lamb]naught cos [the] . The total charge on the semicircle is 12.0...
dear friends
there are some theoretical questions in my mind about electromagnetism
1) in RL circuits the induced emf starts to decrease from its maximum value to zero
and this is caused by the changes of flux
but why does the magnetic flux changes initially very rapidly and then starts to...
I can understand what the electric field vector E and the magnetic flux density vector B mean, but what exactly are the meanings of the two other vectors, the electric displacement vector D and the magnetic intensity vector H? What are their physical explanations?