Question

When an electron moves through magnetic field, the magnitude force on electron
a) increases
b) decreases
c) remains same
d) none of above

In interference pattern, energy is
a) created at position of maximum
b) destroyed at position of maximum
c) conserved but is redistributed
d) none of above

Answer 1

@ganeshie8 and @ikram002p sorry disturbed ya again ^_^

Answer 2

witch what do ya think ??? :/

Answer 3

lolz i think for the first one its a but not sure

Answer 4

the second is c also im not sure , so just ignore my answer :D

Answer 5

sry sarah :O

Answer 6

@Mashy you should teach me this -.-

Answer 7

In a magnetic field, direction of a charged particle changes,
so there is a force caused by magnetic field

Answer 8

Question.. depends on the field.. is it uniform or not? :P

Answer 9

really dunno :P . Answer in both cases plz ??^_^

Answer 10

do you know the expression for the force experienced by a charge in a magnetic field (which i like to call B field) ?

Answer 11

F = q(v x B)

Answer 12

so.. do u want me to just help you understand this question? or you want me to explain something little more on this?

Answer 13

explanation on question

Answer 14

about*

Answer 15

I know when an electron is projected in magnetic field
q = -e and F = -e v x B

Answer 16

ll brb

Answer 17

ok :(

Answer 18

sorry for the late reply :P

ok.. remember that F is cross product of v and B,
therefore, f is perpendicular to v (and ofcourse to B too)
and therefore, f can NEVER EVER do work on the charge, and hence can NEVER EVER change the velocity
so v WILL REMAIN THE SAME

e is the same..

so the only question is, is B the same?

if B is the same.. then obviously f is gonna remain the same
but if B is changing, then of course, f will change accordingly

Answer 19

thank you sooooooooooooooo much @Mashy ^_^
I got it second one its C :)

Answer 20

yup thats right ;-)

Answer 21

thanks again :)