An electron moving with uniform region velocity in x direction enters a region of uniform magnetic field along y direction. Which of the following quantities is (are) non zero and remain constant? I.     Speed of the electron II.    Momentum of the electron (magnitude) IIL   Kinetic energy of the electron IV.   Force of the electron (magnitude)
(a)	only I and II	(b)	only III and IV	(c)	all four	(d)	only II and IV

Question ID - 154483 | SaraNextGen Top Answer

An electron moving with uniform region velocity in x direction enters a region of uniform magnetic field along y direction. Which of the following quantities is (are) non zero and remain constant? I.     Speed of the electron II.    Momentum of the electron (magnitude) IIL   Kinetic energy of the electron IV.   Force of the electron (magnitude)
(a)	only I and II	(b)	only III and IV	(c)	all four	(d)	only II and IV