Right Hand Rule

1. Right Hand Rule

2. Right Hand Rule - The relationship between the flow of electrons and the direction of .magnetic field

4. Since the velocity and magnetic field are perpendicular with each other, the thumb points to the direction of the charge, and the direction of the magnetic field is through your fingers. When you curl your fingers, it will indicate the direction of the magnetic force.

5. Magnitude of magnetic force F = Bqv Component of the velocity perpendicular to B Magnitude of force in Newtons Magnetic induction in webers/meter2 Charge in Coulombs

6. Example • What is the force on an electron that moves with a speed of 106 m/sec perpendicular to a magnetic field of 0.5 weber/m2? The charge of an electron is 1.6 x 10-19 C. Given Speed of electron v 106 m/sec Magnetic field B 0.5 weber/m2 Charge of an electron q 1.6 x 10-19 C

7. SOLUTION: F = B v q = 0.5 weber/m2(106 m/sec )(1.6 x 10-19 C) P.S : 1 ampere = 1 coulomb/s = 1 C/s F= 8 x 10 -14 N

8. SOLENOID

9. If a wire is bent into many continuous loops to form a long spiral coil, then the magnetic lines of force tend to go through the center of the coil from one end to the other rather than around the individual loops of wire. Such a coil, called a solenoid, behaves in the same way as a magnet and is the basis for all electromagnets.

10. Direction of magnetic field, counterclockwise Direction of moving charge, according to the right hand crew rule