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Electric current question help?
Calculate the number of electrons passing through a wire in 10 minutes when the current is:
1 (then that U with a line extending from the left hand side of) amps. I dont know if that symbol changes the question? If so could you give me its name please.
Anyway, I worked out the charge in coulombs as 1*(10*60) = 600 coloumbs. I then divided this by the charge of 1 electron, 600/(1.6*10^-19) and got 3.75*10^21.
However my book says the answer is 3.8*10^15.
What am I doing wrong?
2 Answers
- Big DaddyLv 78 years agoFavorite Answer
That symbol is the lower-case greek letter "mu" (µ), and means "micro" or 10^-6.
So not 1A, but 1 micro A.
- HyperDogLv 78 years ago
That "u" shaped symbol refers to the metric prefix "micro" -- therefore the value is in microamperes, or 1/1,000,000 of an ampere, also expressed as 0.000001 A.
The rest is a multiplication problem; simply substitute the above decimal fraction for the "1" in your equation above.
