Recent content by papercace

Oh yeah, I had forgotten about that. And thank you. 😄

Hi! I had the same dilemma when I wanted to choose what to study, since I have similar interests. I was undecided between computer science and physics (and engineering). I ended up choosing engineering physics (which is popular in my country) with the reasoning that it is easier to learn CS on...

Here is a picture.

I don't think that is a problem since I don't get a high enough voltage to break the diod.

No I don't have access to any iron core. Maybe that would do the trick. As mentioned earlier, I only get 1 volt when trying with only the two coils. I can't make them larger because they won't fit in the required space, that is why I'm using four coils instead. But theoretically speaking...

I have tried to make an AC-generator to create a voltage over an LED. The circuit diagram can be seen in the attached figure. It consists of four coils attached in series and a rotating magnet in the middle. I first tried with only two of the coils on either sides of the magnet, and got 1 volt...

Now I understand. It's useful to take an extra hard look at the formulas when trying to use them. Thanks :)

It states that the sum of the strength of the B-field in a tangential direction to the loop is proportional to the current enclosed by the loop. If I may guess, we can only solve the integral analytically if the B-field in the tangential direction is assumed to be a constant over the entire...

Homework Statement The problem is basically about tow infinite parallel wires separated by a distance ##d## with equally strong but opposite currents. You have to calculate the B-field outside the wires (not the field in between them). Homework Equations Ampères law: ##\oint \mathbf B \cdot...

Homework Statement Consider an electromagnetic field in an empty space in the region ##0 \leq z \leq a## with the following non-zero components: $$E_x = -B_0\frac{\omega a}{\pi}\sin\left(\frac{\pi z}{a}\right)\sin\left( ky-\omega t\right)\\ B_z = B_0\frac{ka}{\pi}\sin\left(\frac{\pi...

Yes I know what impulse is. If the frogs jump simultaneously, then the impulse time will be short but the force impacted on the boat will be large. If they jump one after the other, the force of each jump will be small but they will do it over a longer time. In the end they should add up to be...

Let's say you've got a boat filled with n frogs of mass m each. Let's also say that all the frogs jump simultaneously out of the boat in the same direction with velocity v, then the boat will get a velocity v1 in the opposite direction because of conservation of momentum. Now if we instead let...

Do politicians count as celebrities? If so, Angela Merkel has a phd in physical chemistry.

There is no gravity in space.

Try using this formula : v=\lambda \cdot f Where v is the speed of the wave, \lambda is the wave length and f is the frequency. Hint: The frequency is always the same in this case.