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Physics : Recent Questions and Answers (Page 763)

Find answers to your questions about Physics or help others by answering their Physics questions.

Is this analogy of Induced emf correct?

I have searched PSE (and many other sites on internet) for the theoretical reason of induced emf. All I got was that the phenomenon of Induced EMF is experimental fact...

Asked on 12/06/2020

1 answer

How to obtain a high-current AC power source with adjustable frequency?

I'm trying to investigate how the frequency of the alternating current in the solenoid affects the ring motion for a Thomson Jumping Ring apparatus. I have a variable frequency AC...

Asked on 12/06/2020 by Teresa

1 answer

In the double-slit experiment, why is it never shown that particles may hit the space between or outside the slits?

In depictions of the double-slit experiment that model the photon or electron as a particle, i.e. when attempting to measure which slit the particle passes through, it always shows the...

Asked on 12/06/2020 by Andrew Cheong

5 answer

Electron gun; potentials around charged plates

I know that an electron gun releases electrons by thermionic emission and accelerate the electron through charged plates, and that the electrons are not gaining any energy after they leave...

Asked on 12/06/2020

1 answer

Force exerted on an uncharged particle in a uniform magnetic field?

I'm struggling to understand how to calculate the force exerted on an uncharged particle in a magnetic field. Consider the following setup: a ball of ferromagnetic iron weighing 1kg is...

Asked on 12/06/2020 by Dubukay

3 answer

Renormalisation in the curved background

Suppose we have some field theory on a curved background, and the metric tensor $g_{mu nu} (x)$ is a smooth function of the position. For simplicity, let's consider a...

Asked on 12/06/2020

1 answer

Quantum Tunneling and Negative Kinetic energy

I don't understand how a particle can exist with negative kinetic energy.Consider this scenario: Here, an electron is...

Asked on 12/06/2020 by Shreyas Pradhan

1 answer

Conservation of heat equation: what represent heat, enthalpy or internal energy?

I'm trying to write the heat transfer equation in an arbitrary fluid (compressible and viscous). Consider an adiabatic system where the only heat generated is due to the internal friction/viscosity....

Asked on 12/06/2020 by Foad

1 answer

Condition for a liquid to stick to a surface

My physics textbook says that : A fluid will stick to a surface if the surface energy between fluid and solid is smaller than the sum of surface energies between...

Asked on 12/06/2020 by swapnil gangwar

2 answer

Property of surface Green function in electrostatic field

Let's consider a 2D-square with 4 equal subsquares containing different dielectrics. Inside the square domain, the unknown electric potential function $Phi$ satisfies the Laplace equation: $$nabla^2Phi=0$$...

Asked on 12/06/2020 by Ming Yang

1 answer

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