I haven't had anything about this subject for 3 years, so I'm a bit rusty.
Maybe someone can help me out with some of my homework?
1: The ends of a length of wire are label a and b.
If the current in the wire is iab = -3A, are the electrons moving toward a or b? How much charge passes through a cross section of the wire in 3 seconds?
Since the current is negative, it means its moving b->a, which means the electrons are moving towards b, because the electrons move the opposite direction of the current. (Correct?)
Not sure about the second part though..
Amperes = Coulombs per second.
A = C/s.
A = -3 Amperes
s = 3 seconds.
The charge of electron is -1.602 x 10^-19 Coulombs.
What do I do with that information?
-----------------------------------------------------------
2: The current through a particular circuit element is given by i(t) = 10sin(200 * pi * t) Amperes in which t is in seconds and the angle is in radians. a. Sketch i(t) to scale versus time for t ranging from 0 to 15 ms(milliseconds). b. Determine the net charge that passes through the element between t = 0 and t = 10 ms. c. Repeat for the interval from t = 0 to t = 15ms.
No idea about this one o_o
---------------------------------------------------------
3: The charge carried by an electron is 1.9 x 10^-19 C. Suppose that an electron moves through a voltage of 120 V from the positive polarity to the negative polarity. How much energy is transferred? Does the electron gain or lose energy?
Thanks for the help in advance :3
Maybe someone can help me out with some of my homework?
1: The ends of a length of wire are label a and b.
If the current in the wire is iab = -3A, are the electrons moving toward a or b? How much charge passes through a cross section of the wire in 3 seconds?
Since the current is negative, it means its moving b->a, which means the electrons are moving towards b, because the electrons move the opposite direction of the current. (Correct?)
Not sure about the second part though..
Amperes = Coulombs per second.
A = C/s.
A = -3 Amperes
s = 3 seconds.
The charge of electron is -1.602 x 10^-19 Coulombs.
What do I do with that information?
-----------------------------------------------------------
2: The current through a particular circuit element is given by i(t) = 10sin(200 * pi * t) Amperes in which t is in seconds and the angle is in radians. a. Sketch i(t) to scale versus time for t ranging from 0 to 15 ms(milliseconds). b. Determine the net charge that passes through the element between t = 0 and t = 10 ms. c. Repeat for the interval from t = 0 to t = 15ms.
No idea about this one o_o
---------------------------------------------------------
3: The charge carried by an electron is 1.9 x 10^-19 C. Suppose that an electron moves through a voltage of 120 V from the positive polarity to the negative polarity. How much energy is transferred? Does the electron gain or lose energy?
Thanks for the help in advance :3