00:01
The question is asked which are the following options are true when a magnetic force acting on an electric charge in a uniform magnetic field.
00:07
In the question you decide, there are more than one correct answers.
00:10
First of all, we know when an electron is moving with a velocity v into an uniform magnet field b with the charge of q, it experiences a force of magnetic force f.
00:24
We know the relation between all the terms f is equal to q, v, b, b.
00:30
Sine theta where theta is the angle between angle between v and b velocity and magnetic field if velocity and magnetic field parallel theta is zero so sine theta becomes zero finally the magnetic force yes becomes zero they should not be parallel if that's rd is stationary that means if v is zero then will be also zero there will be no magnetic force let us see the given options one -by -one with this concept we have led now here the first option is saying a magnetic force is exalted on electric charge moving to a uniform magnetic field there existed a magnet field and the electron charge is moving and so the magnetic field will be exerted it is true the direction of magnetic force acting on a moving charge in a magnetic field is purpose perpendicular to the direction of magnetic field.
01:34
It is true.
01:35
Why because the three terms, magnetic force, velocity, magnetic field are mutually perpendicular to each other.
01:43
When an electron charge is flowing through a magnetic field, the magnetic force will be perpendicular to both velocity and magnetic field.
01:51
So option b is true...