Can u help with this problem?
A charged particle of mass 1.50 g is moving at a
speed of 1.50 3 104 m/s. Suddenly, a uniform magnetic
field of magnitude 0.150 mT in a direction perpendicular
to the particle's velocity is turned on and then turned off in
a time interval of 1.00 s. During this time interval, the magnitude
and direction of the velocity of the particle undergo a negligible change,
but the particle moves by a distance of 0.150 m in a direction perpendicular
r to the velocity. Find the charge on the particle.
I know that qvb=ma
The only unknown to get q is a. How to get it ?
Also I am confused, of how it is mentioned that change of velocity is negligible and there is acceleration ? shouldn't a be zero ?