Physics Questions, Problems & Solutions : TransWikia.com ~ Page 86

Battery voltage jump when applying constant current

When a constant current is applied to a battery, its voltage jumps by a huge amount in a moment. It jumps up if we apply constant charge current and down...

Asked on 08/28/2021 by leventov

0 answer

Average kinetic energy in 1 dimension according to Maxwell-Boltzmann Distribution

The format of the 3 dimensional MB distribution is $A cdot e^{-frac{E}{k_BT}} cdot g(E)$ in which $A$ can be derived using normalization (integration up to $infty$ must...

Asked on 08/28/2021

2 answer

Physics vs Electronics (Smartphone charger)

Basically, an electric charger consists of a transformer, which transfers electrical energy from one inductance to another.. َAs i imagine the process physically the first circuit...

Asked on 08/28/2021 by Okba

2 answer

Equivalence principle: electric charge and coil

The near-range magnetic field $vec{B}$ of a point charge $q$ at distance $vec{r}$, moving at a non-relativistic velocity $vec{v}$,...

Asked on 08/28/2021

0 answer

Positivity for the level of Chern-Simons theory

In many classical papers about Chern-Simons theory (see, e.g. [1]),it is claimed that the Chern-Simons theories with gauge group $G$ are classified by an element of $kin H^4(BG,mathbb Z)$,...

Asked on 08/28/2021

0 answer

Does correlation of the measurement outcomes imply that a state is entangled?

As per Wikipedia:Quantum entanglement is a physical phenomenon that occurs when pairs or groups of particles are generated or interact in ways such that the quantum state of...

Asked on 08/28/2021 by hardik24

2 answer

Trouble understanding why $ {bf p} a_{bf p}a_{bf -p}$ and ${bf p} a^dagger_{bf p}a^dagger_{-bf p}$ are odd functions of $bf p$

Peskin and Schroeder's QFT book in equation (2.33) gives the momentum operator $bf P$ as$${bf P} = - int d^3 x pi(x) nabla phi (x) = int...

Asked on 08/28/2021 by delon

2 answer

Electric field associated with a stationary electron

In the framework of QFT, quantum fields are the fundamental objects instead of point-like notion of particles. Particles, at least fundamental ones like electron, are understood to arise as excitations...

Asked on 08/28/2021

2 answer

The number operator in second quantization

I have a question about the number operator as applied to a quantum gas containing a mixture of different spins. Let us say the total number operator $hat{N}$ counts...

Asked on 08/28/2021

0 answer

Can two semi-infinite plane waves undergo perfectly constructive interference?

This is building off of a question I asked here. When discussing the linked problem with some friends, the consensus seemed to be that the reason two identical...

Asked on 08/28/2021 by Riley Scott Jacob

1 answer

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