Recent content by mvpshaq32

From what I understand, transistors can be viewed as several things, one of which is a resistor. So how much resistance is a transistor turned on generally equivalent to? And what is normally considered a large or small resistance? I know voltmeters have a large internal resistance in...

Yes, exactly, the geometric meaning. What does its value represent? For example the magnitude of the cross product represents the area of the parallelogram formed by two vectors. So what does the dot product represent?

Simple question, but I don't know why I never learned this before. If the scalar projection of vector B onto vector A is B * Unit vector of A (or [A dot B]/[magnitude of A]), then what does the dot product of simply A and B give you, assuming neither is a unit vector. If it's not clear what...

Yes, I understand that, but does radially outward not mean outward in all directions? That includes going through the ends of the cylinder

Just refreshing on Gauss's Law. For a line of charge, we choose a cylindrical Gaussian surface. But if the E field is radially outwards, why is there no flux through the ends of the cylinder and only through the sides? I know that the field is only assumed to be perpendicular to the sides...

Homework Statement f(s) = f(\sigma + j\omega) = \frac{1}{(1+s)^2} Find the magnitude and phase angle of f(j\omega) Homework Equations s = j\omega is a substitution you can make, but I'm not sure if you are supposed to apply that here The Attempt at a Solution I tried substituting \sigma +...

Homework Statement Determine whether 1/n! diverges or converges. So far, we have only learned the comparison tests, p-series, geometric series, divergence test, and integral test, so I can only use these tests to prove it. Homework Equations N/a The Attempt at a Solution I...

Homework Statement E from 1 to infinity [2+(-1)^n]/[n(n^1/2)] Homework Equations We only have had learned comparison tests, power series, and divergence tests. The Attempt at a Solution I decided to split the function into its numerator multiplied by its denominator: 2+(-1)^n *...

Thanks for all the help gneill!

So work done by the field and work done by the electric force can be used interchangeably?

Ok, so the way I'm interpreting your example is like this; If you bring a + charge from infinity towards a + charge at the origin, the field and the electric force will repel the charge to the right, but the external force will be towards the left (or the origin). If you bring a - charge from...

Then does that mean we're looking at the work done by the field/electric force, it's positive if the particle is moving in the same direction as the field and negative when the particle is moving against the field?

Thanks gneill Also, now that I think about it, shouldn't the work have be done by the field and instead of the electric force? But otherwise, what would it mean by negative or positive work? In my book there's a problem: And its explanation is that if q3 is brought in from infinity...

Homework Statement A particle with a charge of + 4.20 nC is in a uniform electric field E directed to the left. It is released from rest and moves to the left; after it has moved 6.00 cm, its kinetic energy is found to be +1.50 * 10^-6 J What work was done by the electric force...

Homework Statement A long coaxial cable consists of an inner cylindrical conductor with radius a and an outer coaxial cylinder with inner radius b and outer radius c. The outer cylinder is mounted on insulating supports and has no net charge. The inner cylinder has a uniform positive charge per...