Recent content by terryds

Homework Statement Determine the y_particular solution Homework Equations The Attempt at a Solution I've tried this for hours but still don't get the correct value. This is what I get: The question is the same as the one I found from...

Homework Statement Determine the norton equivalent Circuit Homework Equations Norton theorem The Attempt at a Solution First, I transform 5A and 10 ohm (in parallel) into 50 V and 10 ohm in series So, there are three meshes, for Mesh 1 (I assume the current is clockwise) ##30 i_1 - 10...

Really? But RC and CR are different, RC is a low-pass filter and CR is a high-pass filter.

Is there any difference between RL vs LR circuit? Which one is for low-pass/high-pass filter? Please help

So, what happens at point (0,0,0) ?The divergence is infinity or ##\frac{\rho}{\epsilon_0}##?

Homework Statement By Gauss' law, how is it able to obtain ## \nabla \cdot \vec{E} = \frac{\rho}{\epsilon_0} ## ? By Coulomb's law, ##\vec{E} = \frac{1}{4\pi\epsilon_0} \frac{q}{r^2} \hat{r}## I calculate the divergence of ##\frac{1}{r^2} \hat{r}## and get the result is zero That means the...

Is there an easy way to check it inward/outward?

Alright, I understand! It seems that I can't make it series because the current at 10 ohm is different than 5 ohm and 3 ohms!

Homework Statement Determine the equivalent resistance and the total current!Homework Equations Ohm's Law Wye-Delta Transformation The Attempt at a Solution [/B] I do the series on 10 ohm, 5 ohm, 3 ohm resistors, because it is node e-g,g-h,h-f, so it becomes 18 ohms (e-f). Then I do the...

What is actually the unit normal vector of a surface? Is it this? Or this one? I see that those are opposite in direction. But, I want the correct one, which means that it should point outward. So, which one is correct?

So, the solution is wrong, right? I also doubt the book since it's just written by my seniors hahaha.. thank you very much

Homework Statement Plane A flies with speed 0.6c chasing plane B which speed is 0.4c . Both speed is measured by observer on Earth. Then, plane B fires a small rocket which rest mass is 10 kg towards plane A. Rocket speed is 0.2c relative to plane B where c equals the speed of light in vacuum...

Will there be any fringes then?

So, does the formula still valid for d < lambda? Why will there be no total cancellation? I mean, you mean the cancellation caused by the difraction? Or, what? Please explain it. Thanks

So, what happens if the distance between slits is much smaller than the wavelength?