Question

1- A conducting ring of resistance R and radius l is placed in external magnetic field. Determine the charge which will pass through the ring after we give it the shape of 8? Assume that the radius of the top ring is twice smaller that the one of the bottom ring.

2- A conducting rod of length l = 10 cm is moving in external magnetic field B = 0.1 T which makes an angle α = 60◦ with the axis of the rod. How should we move the rod to make sure that the potential difference between its ends grows by 1 V every second?

3- An electron is moving in external electric, E~ and magnetic, B~ , fields. The electric and magnetic fields are perpendicular to each other, E~ · B~=0. The velocity of an electron is perpendicular to both E~ and B~ . Describe the motion of an electron. Under what conditions electron will be moving along the straight line with the constant speed?

Answer 1

2. 3 se cona 2 2 st R e. 2 2.