Question 1

A proton describes a circular orbit of radius 27 cm perpendicular to a magnetic field of modulus 1.3 T.

Find:

(a) Find the modulus of its velocity.; v=... x 10⁷ m/s

(b) Find the period of its motion.; T=... x 10^-8 s

(c) Find its kinetic energy. K=... x 10^-13 J

Question 2

(1) An electron is subjected to a magnetic force F_B = ( - 4,1i + 8,4j ) x10^-13 N in a magnetic field B = - 1,1k T. What is the speed of the electron, knowing that v_z = 0?