2. 

3. A wire 1 meter long carries a current of 5 Amps. The wire is at right angles to a uniform magnetic field. The force on the wire is 0.2 N. What is the magnetic field strength? = 0.04 Tesla

4. A wire 10 cm long is at right angles to a uniform magnetic field. The field has magnetic strength of 0.6 Tesla. The current through the wire is 4.0 A. What force acts on the wire?

5. A wire 10 cm long is at right angles to a uniform magnetic field. The field has magnetic strength of 0.6 Tesla. The current through the wire is 4.0 A. What force acts on the wire?

6. A wire is held in place as shown between the opposing faces of two bar magnets. It carries conventional current to the right. The magnetic force on this horizontal segment of wire is 1.to the left.4. up. 2.to the right.5. down. 3.out of the page.6. zero.

7. A wire is held in place as shown between the opposing faces of two bar magnets. It carries conventional current to the right. The magnetic force on this horizontal segment of wire is 1.to the left.4. up. 2.to the right.5. down. 3.out of the page.6. zero.

8. The magnetic force on a current-carrying wire is at a maximum when B  I, ( F max = BI ) and zero when B  I. At intermediate positions where an angle, , separates the directions of B and I, the force is calculated by 1. BI cos  2. BI sin  3. BI tan 

9. From these observations alone, what definite conclusions can be made?  s are positively charged,  s negative.  s are positively charged,  s negative. 3. can only say ,  oppositely charged.

10. From these observations alone, how can we compare the magnitude of their charges?  q   <  q    q   =  q   you cannot determine this  q   >  q  

11. From these observations alone, what definite conclusions can be made?  s are more massive than  s.  s are more massive than  s. 3.  s are more massive than  s. 4.The masses cannot be directly compared.

12. Answers on trajectories of radioactive products:  s are positively charged,  s negative.  you cannot determine this 1.The masses cannot be directly compared.