1. Do Now (then quiz) Two charges, +5. 0C and -6. 0C are placed 3m apart
Do Now (then quiz) Two charges, +5.0C and -6.0C are placed 3m apart. How much force do they exert on each other?
Most of you did great on the quiz last week!!!
If you can solve this problem and the next few problems, you will ace today’s quiz as well

2. Do Now Two charges, +5. 0C and -6. 0C are placed 3m apart
Do Now Two charges, +5.0C and -6.0C are placed 3m apart. How much force do they exert on each other?

3. Two charges exert a force of 50N on each other
Two charges exert a force of 50N on each other. What is the new force if one of the charges is doubled?

4. Two charges exert a force of 3N on each other
Two charges exert a force of 3N on each other. What is the new force if one charge is doubled and the other is tripled?

5. Two charges exert a force of 200N on each other
Two charges exert a force of 200N on each other. What is the new force if the distance is doubled?

6. Two charges have a force of 400N between them
Two charges have a force of 400N between them. What is the new charge if one of the charges is tripled and the distance is increased 4 times?

7. Quiz now You can refer to your notes if it helps you
Do not refer to your neighbor’s paper. That is off limits!
No talking, no cheating, no communicating with anybody for 10 mins
If you can communicate telepathically to your friends, that is ok with me

8. What happens when you bring two positive charges together?

9. What is around a charge? +

10. All charges have an electric field-

11. How do we represent an electric field?+

12. How do we represent an electric field?-

13. How do you represent an electric field?+ -

14. How do you represent an electric field?+ + -

15. How do you represent an electric field?- + -

16. Rules for Drawing Electric Field Lines
The lines for a group of charges must begin on positive charges and end on negative charges
In the case of an excess of charge, some lines will begin or end infinitely far away
The number of lines drawn leaving a positive charge or ending on a negative charge is proportional to the magnitude of the charge
No two field lines can cross each other

17. How do you represent an electric field?+ - -

18. How do you measure an electric field?

19. How do you measure an electric field?
Use a test charge

20. A charge of 4. 0 x 10-5C experiences a force of 60N at a certain point
A charge of 4.0 x 10-5C experiences a force of 60N at a certain point. What is the electric field intensity at that point?

21. A charge experiences a force of 3 x 10-4N at a point where the electric field intensity is 5.0 x 10-6N/C. What is the magnitude of the charge?

22. Pick any 3 to solve!
Draw the electric field lines between a positive and a negative charge
A charge of 2.0 x 10-7C experiences a force of 50N at a certain point. What is the electric field intensity at that point?
A charge experiences a force of 0.004N at a point where the electric field intensity is 4.0 x 10-6N/C. What is the magnitude of the charge?
Electrons of charge -1.6 x 10-19C are accelerated through a field of 1 x 106N/C. What is the force acting on the electrons?