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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsAtomic structureMedium2 minQB

PhysicsMediummultiple choice

A negative charge is revolving around a fixed positive charge in a circular orbit. If the classical idea of an accelerating charge radiating energy is valid, then the negative charge will:

Options:(select one or more)

Answer:

A, B, D

Solution:

$\frac{m v ^{2}}{r} = \frac{k Z e ^{2}}{r ^{2}} \Rightarrow K . E . \propto \frac{1}{r}$ , which increases as $r$ shrinks; P.E. $= - \frac{k Z e ^{2}}{r}$ decreases twice as fast; $ω \propto r^{- 3/2}$ increases. So the charge spirals inward.

Subject:PhysicsTopic:Modern PhysicsSubtopic:Atomic structure

⏱ 2mℹ️ Source: QB

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