shinigami1m 3 years ago whats the direction of electric field on q

1. shinigami1m

|dw:1329405754471:dw|

2. shinigami1m

and... please tell methe rules too... D: the direction is confusing

3. Mashy

I don't understand those symbols :O

4. ash2326

shininigami electric field 's direction is away from a positive charge, and towards a negative charge.

5. Mashy

|dw:1329406138267:dw|

6. Mashy

this is the case if BOTH CHARGES ARE POSITIVE.. and their magnitudes almost same..

7. shinigami1m

but my answer key says like this....

8. shinigami1m

|dw:1329406244978:dw|

9. ash2326

yeah, it's because we have to show only the horizontal field, all are positive, and if q2>q>q1, then this will be the answer

10. shinigami1m

is it from left to right or it should be from largest to biggest??

11. Mashy

sorry.. direction of electric field on Q? :D!!.. i just drew lines of force!!..

12. ash2326

|dw:1329406488894:dw|see from a positive charge field should originate if there are two positive charges in a line, then charge will originate from both, here q2 and q1 are positive

13. ash2326

|dw:1329406558748:dw|

14. ash2326

|dw:1329406677857:dw|if q2> q1 => field due to q2 (E2) > field due to q1 (E1) so in between them, the fields are opposite effective field between them = E2- E1 int he direction shown

15. shinigami1m

i think i;m getting this... hahah since q is only a test charge... i think i can deny its quantity

16. Mashy

actually your question doesn't make sense.. direction of electric field ON q!??!?!? ..