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OCR A physics question

yaz2007

I am really stuck on a question and was wondering if any of you can help?

The question is:

The current carriers in a piece of semiconducting material have a charge of 1.6x10^-19 C. Calculate the number of charge carriers entering the material per second, when the current is 3.0 uA

Reply 1

SamuelOJ

i think you just have to divide the current (3uA) by the charge on an electron (1.6x10^-19). should give u about 1.9x10^13. Hope this helps

Reply 2

yaz2007

Original post by SamuelOJ

i think you just have to divide the current (3uA) by the charge on an electron (1.6x10^-19). should give u about 1.9x10^13. Hope this helps

dont u need to convert 3uA into Amps?

Reply 3

SamuelOJ

Original post by yaz2007

dont u need to convert 3uA into Amps?

yes you would have to convert into amps. 3uA = 3x10^-6 A.

Reply 4

yaz2007

i got 1.875 x 10^25...

Reply 5

SamuelOJ

Original post by yaz2007

i got 1.875 x 10^25...

i think it might be the way u typed it on ur calculator. if u use the fraction button u should get x10^13 but if u use the divide u might get x10^-25. at least thats what happens to me. idk why tho