Recent content by AdrianMachin

Well, as far as I know, I heard that we don't have any negative signs in error equations... I mean between the delta terms. How can I brush up on this topic? I'm studying in a different language than English so I can't find English resources for this topic on the Internet. What is this topic...

Homework Statement [/B] I was reviewing this stuff and although I excelled at it once, I seem to forget some of it. For example, please consider this: Homework Equations R_C=\frac {R_1R_2} {R_1+R_2} + R_3 Here's the correct formula for its error: \Delta R_C=\frac {R_1R_2} {R_1+R_2} \left[...

I think I was wrong to worry about the Ohm's law, it is actually embedded in those two equations.

No change in ##P##.

Homework Statement A potential difference V is connected across a device with resistance R, causing current i through the device. Rank the following variations according to the change in the rate at which electrical energy is converted to thermal energy due to the resistance, greatest change...

Homework Statement Note that this formula (##C=4 \pi \epsilon_0 R##) and the others we have derived for capacitance involve the constant multiplied by a quantity that has the dimensions of a length. Homework Equations ##\epsilon_0## has the following units in SI: $$\frac {C^2} {N \cdot m^2}$$...

Homework Statement (The complete problem statement and solution are inside the attached picture) Two isolated, concentric, conducting spherical shells have radii ##R_1=0.500 m## and ##R_2=1.00 m##, uniform charges ##q_1=2.00 mC## and ##q_2=1.00 mC##, and negligible thicknesses. What is the...

Homework Statement Plot the electric potential ##V(r)## due to a positively charged particle located at the origin of an XY plane. Homework Equations ##V=\frac 1 {4πε_0} \frac q r## The Attempt at a Solution I'm unfamiliar with 3D coordinates at this time, but I like to know how can I plot it...

Excuse me, non-zero speed or acceleration?

Thanks. Please correct my following conclusions if it is wrong: The formula for the work done by the applied force on the electron would be ##W_{app} = m_ead##, so we must move it with a non-zero acceleration in order to have a non-zero ##W_{app}##, and from Newton's second law we'll have...

Well, I don't know the answer to the question you asked.

I think that makes a paradox because if there are no other forces than the electric force caused by the field which is perpendicular to the surface and the applied force, then there is an acceleration based on Newton's second law, so ΔK cannot be zero...

What do you mean? The magnitude of Fapp? I don't know, that's why I asked this question.

This is not a homework, but a question formed in my mind after reading my textbook. Homework Statement Consider an electron (a charged particle) on a metallic equipotential surface. We know that all the points on the surface are equipotential, thus there will be no force on charged particles...

Thanks a lot, dear BvU! I tried your suggestion and it worked! :smile: Yes, I had a big mistake in my first attempt as you mentioned. What do you mean by this: Is that because of my mistake in taking logarithms or it's generally not considered right to use in these equations?