7.3 voltage and current

370 views

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
370
On SlideShare
0
From Embeds
0
Number of Embeds
11
Actions
Shares
0
Downloads
4
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

7.3 voltage and current

  1. 1. http://www.youtube.com/watch?v=-n1pSHzdahc
  2. 2. 12 December 20107.3 Voltage and Current The cards have keywords with more scientific definitions, can you match them up?
  3. 3. The opposition to the flow ofcurrentThe rate of flow of chargeHow much energy each chargecarriesAll components are ina single branchComponents are inmultiple branches
  4. 4. Aims• State the equations of current and voltage in a series circuit• Describe the changes in current and voltage in a series circuit• Define current and voltage
  5. 5. For a series circuit: The current is the same throughout the circuitI  I1  I 2  I 3
  6. 6. Current is the rate of flow of charge Q I t
  7. 7. I’m countingCurrent how many coulombs of ☺ ☺ electrons go past me every ☺ second The number of ☺ Coulombs flowing ☺ past a point in the A ☺ circuit every second. ☺ I = Q/t ☺ ☺ ☺ ☺ 1 Amp = 1 coulomb per second
  8. 8. I  I1  I 2  I 3V  V1  V2  V3
  9. 9. For a series circuit:The total voltage is the sumof the individual voltagesV  V1  V2  V3
  10. 10. Voltage(emf) ☺ ☺ ☺ ☺ V ☺ ☺ I’m checking the difference in energy (per ☺ coulomb) between ☺ the 2 red arrows ☺ ☺ ☺ 1 Volt = 1 Joule per coulomb
  11. 11. Voltage (p.d.) ☺ ☺ ☺ I’m checking the ☺ difference in energy (per ☺ coulomb) before and after the lamp ☺ ☺ ☺ V ☺ ☺ ☺ 1 Volt = 1 Joule per coulomb
  12. 12. Voltage is the energy transferred per charge W V Q
  13. 13. I  I1  I 2  I 3V  V1  V2  V3
  14. 14. I have learned:I have learned:

×