Site hosted by Angelfire.com: Build your free website today!
Main Desktop Lessons Desktop Review Desktop Lab Desktop Chart Desktop

      

112.
The magnetic field to the right creates the path in red of a moving proton.  The proton's original direction was from the left.

A.  Clockwise path with field coming out of the screen.
B.  Clockwise path with field going into screen.
C.  Counter-Clockwise path with field coming out of the screen.
D.  Counter-Clockwise path with field going into screen.

         
The magnetic field is coming out of the screen.

Force on a charged particle due to a magnetic field is perpendicular to the magnetic field direction.

As the proton entered from the left, the Right-hand rule, shows the force on the proton was upward.  As the proton turns, the force remains perpendicular to the path of the proton .

The proton takes a Counter-Clockwise path.

The Correct Answer is C.

Right-hand rule 
1.   Fingers take the path of the positive particle.
2.  Curve the fingers in the direction of the magnetic field.
3.  The thumb points in the direction of the force on the positive particle.

Electrons and other negatively charged particles use a Left-hand rule instead of a Right-hand rule.