NEET 2019 Model Question Paper 2

Force acting on a charged particle moving with velocity

→

V

is subjected to magnetic field

→

B

is given by

→

F

=a(

→

v

×

→

B

) or, F=qvB‌sin‌θ
(i) When θ = 0º , F=qvB‌sin‌0°=0
(ii) When θ = 90º , F=qvB‌sin‌90°=qvB
(iii) When θ = 180º , F=qvB‌sin‌180°=0
This implies force acting on a charged particle is non-zero, when angle between

→

V

and

→

B

can have any valueother than zero and 180º .