1. Forces caused by magnetic fields

2. What is it? A device used to measure very small currents (like those produced by a magnetic field)

3. F = Bqv F = B = q = v =

4. F = Bqv F = force (N) B = magnetic field strength (Teslas) q = the charge on a particle © v = velocity (m/s)

5. If the particle you are dealing with is an electron, its’ charge will always be 1.6 x 10 -19 C We used this in chapter 20…

6. 1. A beam of electrons moving at a speed of 3 x 10 9 m/s passes thru a magnetic field that has a strength of.0005T. What force acts on the electrons in the magnetic field? 2. Electrons in a cathode ray tube are moving at 6 x 10 4 m/s and pass thru a magnetic field with a force of 0.45 N. What is the strength of the magnetic field?

7. 1. 2.4 X 10 -13 N 2. 4.68 x 10 13 T

8. p. 772 #’s 6-10, 14-16 Your Electricity and Magnetism test is Wednesday! Review Chapter 22-24 notes definitions, units, domains, Field lines, Right -Hand rules Know how to use formulas to problem solve Voltage drops, current, power, magnetic field, equivalent resistance, etc