COMEDK · Physics · 28. Atomic Physics
In the case of the Bohr atom model if \(E_{K}\) and \(U\) are the kinetic and potential energies of an electron in an orbit, then
- A \(E_{K}+U=0\)
- B \(E_{K}-U=0\)
- C \(2 E_{K}+U=0\)
- D \(E_{K}+2 U=0\)
Answer & Solution
Correct Answer
(C) \(2 E_{K}+U=0\)
Step-by-step Solution
Detailed explanation
According to Bohr's atomic model, Kinetic energy \(K\) or \(E_{K}=\frac{U}{2}\) where, \(U=\) potential energy. which is negative. \[ \therefore \quad 2 E_{K}+U=0 \]
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- The fundamental frequency of sound produced in an open pipe of length \(\mathrm{L}_1\) is same as the frequency of the \(3^{\text {rd }}\) harmonic of the sound produced in the closed pipe of length \(\mathrm{L}_{\mathrm{2}}\) Then the ratio of \(\dfrac{\boldsymbol{L}_{\mathrm{1}}}{\boldsymbol{L}_{\mathrm{2}}}\) is :COMEDK 2025 Medium
- The separation between C and O atoms in CO is 0.12 nm . The distance of C atom from the centre of mass isCOMEDK 2025 Medium
- A sample of an ideal gas is taken through the cyclic process ABCA as shown in figure below. It absorbs 60J of heat during the part AB and rejects 80 J of heat during CA . There is no heat exchanged during the process BC . A work of 40 J is done on the gas during the part BC . If the internal energy of the gas at A is 1450 J , then the work done by the gas during the part CA is:
COMEDK 2025 Easy - The minimum energy required by a hydrogen atom in ground state to emit radiation in Paschen series is nearly:COMEDK 2025 Medium
- Three charges \(-q,+Q\) and \(-q\) are placed at equal distances along a straight line. If the total \(P E\) of the system is zero, then the ratio \(Q / q\) becomesCOMEDK 2014 Easy
- Wires made of iron and silicon are cooled from \(50^{\circ} \mathrm{C}\) to \(30^{\circ} \mathrm{C}\), thenCOMEDK 2012 Easy
More PYQs from COMEDK
-
What is the spin only magnetic moment of the metal ion in \(\mathrm{P}\) and the oxidation number of Sulphur in the oxidised product \(\mathrm{Z}\) ?COMEDK 2025 Medium - Given below a first order reaction in the gas phase
\(\mathrm{A}(\mathrm{g}) \rightarrow \mathrm{B}(\mathrm{g})+\mathrm{C}(\mathrm{g})\)
If the initial pressure of the system is \(\mathrm{P}_{\mathrm{i}}\) and the total pressure at \(\mathrm{t}\) seconds is \(\mathrm{P}_{\mathrm{t}}\), the rate constant \(\mathrm{k}\) for the reaction is:COMEDK 2024 Medium - Two spherical bodies of masses \(M\) and \(5 M\) and radii \(R\) and \(2 R\) are released in free space with initial separation between their centres equal to \(12 R\). If they attract each other due to gravitational force only, then the distance covered by the smaller body before collision is
@@COMEDK 2020 Medium - The lines represented by \(a x^{2}+2 h x y+b y^{2}=0\) are perpendicular to each other ifCOMEDK 2016 Easy
- The measure of the angle between the lines \(x=k+1, \quad y=2 k-1, \quad z=2 k+3, \quad k \in R \quad\) and \(\quad \dfrac{x-1}{2}=\dfrac{y+1}{1}=\dfrac{z-1}{-2}\) isCOMEDK 2024 Medium
- The monosaccharides of maltose isCOMEDK 2022 Medium