Recent content by Samanko

The text showed if Fnet = 0 (with F from magnetic fields and electric field), then v = E/B . And we can measure m/e (last equation in the image). My question is, by assuming F = 0, change in y should also be 0 , so the denominator of right side of the m/e equation must be zero. And the...

Thank you!

Thank you!

This is a problem from a textbook, and I can't solve it. I know that the equation of Potential energy of electric dipole. Since the configuration is a little bit complicated. I'm confused applying which electric fields.

I thought the capacitors should be connected by one wire to be in series.

Thank you for answering. I understand each of two capacitors of two instances are parallel. But I don't understand how come the two instances are in series. The wire is directly connected to each instance. Isn' it in parallel?

The circuit is shown. The explanation says "The total potential difference is 2V." "The total equivalent capacitance is C." Since there are 4 parallel capacitors, isn't the equivalent capacitance 4C and total potential difference 4V?

Got it! Thanks.

The textbook says ' A conducting sphere shell with radius R is charged until the magnitude of the electric field just outside its surface is E. Then the surface charge density is σ = ϵ0 * E. ' The textbook does show why. Can anybody explain for me?

I know that if two conducting objects touch each other, the charges will distribute equally over the objects. What if one object has 3 excess electrons, one is neutral? How can the charge distribute equally over two objects?

Yes I'll be careful in the future.

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