I need help, last time no one was right?

Question

The current in the electron beam of a computer monitor is 340 µA. How many electrons per second hit the screen?
electrons/s

Answer 1

1 Amp = 1 Coulomb/sec = 6.241×10^18 electrons /sec
Assuming the entire beam hits the screen,
340 μA(1 A/10^6 μA)(6.241*10^18 electrons/ 1 Amp-sec) = 2.12194*10^15 electrons/sec

Answer 2

Amperes is the unit of electric current. Amperes = coulombs/second.

Thus, you want to divide 0.000340 A (340 µA) by the charge of a single electron, which is 1.60217646 × 10^-19 coulombs (which is the same as multiplying 340 µA by the number of electrons per coulomb).

The result:

2122113315782956.8910280956193...

And since you can't have a fraction of an electron, I suppose you'd just round down. Thus, it's

2,122,113,315,782,956 electrons per second.

this is the best answer

Answer 3

Amperes is the unit of electric current. Amperes = coulombs/second.

Thus, you want to divide 0.000340 A (340 µA) by the charge of a single electron, which is 1.60217646 × 10^-19 coulombs (which is the same as multiplying 340 µA by the number of electrons per coulomb).

The result:

2122113315782956.8910280956193802

And since you can't have a fraction of an electron, I suppose you'd just round down. Thus, it's

2,122,113,315,782,956 electrons per second.

Answer 4

those answers are correct. the only thing i can think of is that it's a trick question. not all of the electrons hit the screen. some hit the appature mask in front of the screen and some miss the screen due to overscan.

Answer 5

How do you know no one was right? You need to do this yourself! Your set of questions shows you should instead be doing your own homework.

Answer 6

what makes you think this time will be different?
how do you know they were wrong last time?