1) A current of 84.1 mA exists in a metal wire. How many electrons flow past a given cross section of the wire in 10.6 min?
2) A nichrome wire with a resistance of 18 resistance is conne cted across the terminals of a 24 V flashlight battery. How much current is in the wire? answer in units of A.
2007-08-04 20:31:27 · 2 answers · asked by jay b 1 in Science & Mathematics ➔ Physics
You won't learn anything if other people do your homework for you.
Here's a hint though. Go look a the definition of a coulomb. In particular look at the units. Since you know the current and the amount of time, just convert the units...
The second one...well...I can't find a good "hint" so here's a formula: E=I R
You know E and R so what's I?
2007-08-04 20:37:05 · answer #1 · answered by Anonymous · 1⤊ 0⤋
1) 84.1*10.6*60*10^-3 / (1.6*10^-19) = 3.342975 Ã 1020
2) 24/18 = 1.67 A
2007-08-04 20:49:28 · answer #2 · answered by ag_iitkgp 7 · 0⤊ 1⤋