Question #a69a3

1 Answer
A08
Jun 6, 2016

c) positive #y#-direction

Explanation:

For a charge moving with velocity #vecv# in a magnetic field #vecB#, the direction of magnetic force is given by the direction of vector
#vecvxxvecB#
Given is #vecv=vhati#
To find the direction of magnetic field at the location of charge we use the right hand rule. The figure below is self explanatory.
education.com
In the problem we see that in a right handed coordinate system
#vecB=-Bhat k#
Direction of magnetic force is given by
#hati xx-hatk=hatj#
which is the direction of positive #y#-axis

Related questions
Impact of this question
928 views around the world
You can reuse this answer
Creative Commons License