AP EAMCET · PHYSICS · Atomic Physics
The radius of the innermost electron orbit of hydrogen atom is \(5.3 \times 10^{-11} \mathrm{~m}\). Then the ratio of radii of the orbits of \(n=2\) and \(n=3\) is
- A \(9: 4\)
- B \(2: 3\)
- C \(4: 9\)
- D \(3: 2\)
Answer & Solution
Correct Answer
(C) \(4: 9\)
Step-by-step Solution
Detailed explanation
No solution. Refer to answer key.
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
- A ball is falling freely from a height. When it reaches \(10 \mathrm{~m}\) height from the ground its velocity is \(v_0\). It collides with the ground and loses \(50 \%\) of its energy and rises back to height of \(10 \mathrm{~m}\). Then the velocity \(v_0\) isAP EAMCET 2010 Medium
- A prism \((\mu=1.5)\) has the refracting angle of \(30^{\circ}\). The deviation of a monochromatic ray incident normally on its one surface will be (given, \(\sin 48^{\circ} 36^{\prime}=0.75\))AP EAMCET 2020 Medium
- In the given circuit, the angular frequency of the voltage source is \(70 \times 10^3 \mathrm{rad} \mathrm{s}^{-1}\). The circuit effectively behaves like,
AP EAMCET 2019 Easy - A sphere of mass \(2 \mathrm{~kg}\) and diameter \(4.5 \mathrm{~cm}\) is attached to the lower end of a steel wire of \(2 \mathrm{~m}\) length and area of cross-section \(0.24 \times 10^{-6} \mathrm{~m}^2\). The wire is suspended from \(205 \mathrm{~cm}\) high ceiling of a room. When the system is made to oscillate as a simple pendulum, the sphere just grazes the floor at its lowest position. The velocity of the sphere at the lowest position is (Young's modulus of steel \(=2 \times 10^{11} \mathrm{Nm}^{-2}\) and acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )AP EAMCET 2018 Hard
- A large tank filled with water to a height ' \(h\) ' is to be emptied through a small hole at the bottom. The ratio of the time taken for the level to fall from ' \(h\) ' to \(\frac{'}{2}\) ' and that taken for the level to fall from \(\frac{1 h}{2}\) to ' 0 ' isAP EAMCET 2024 Medium
- A charged particle moving along a straight line path enters a uniform magnetic field of 4 mT at right angles to the direction of the magnetic field. If the specific charge of the charged particle is \(8 \times 10^7 \mathrm{C} \mathrm{kg}^{-1}\), the angular velocity of the particle in the magnetic field isAP EAMCET 2024 Easy
More PYQs from AP EAMCET
- A block of mass 1.5 kg kept on a rough horizontal surface is given a horizontal velocity of \(10 \mathrm{~ms}^{-1}\). If the block comes to rest after travelling a distance of 12.5 m , the coefficient of kinetic friction between the surface and the block is (Acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )AP EAMCET 2024 Easy
- The condition that \(x^3-p x^2+q x-r=0\) may have two of its roots equal to each other but of opposite sign isAP EAMCET 2021 Medium
- Ethyl chloride reacts with sodium ethoxide to form a compound \(A\). Which of the following reactions also yields \(A\) ?AP EAMCET 2006 Easy
- Find the value of k, if the line joining the points (2, k) and (3, 7) is parallel to the line joining points (− 2,1) and (3, 0).AP EAMCET 2021 Easy
- \(\int(\sqrt{1+\sin (2 x)}) d x=\)AP EAMCET 2020 Easy
- If \(\operatorname{Tan}^{-1}\left[\frac{1}{1+2}\right]+\operatorname{Tan}^{-1}\left[\frac{1}{1+(2)(3)}\right]+\operatorname{Tan}^{-1}\left[\frac{1}{1+(3)(4)}\right]+\cdots \cdots+\operatorname{Tan}^{-1}\left[\frac{1}{1+n(n+1)}\right]=\operatorname{Tan}^{-1} \theta\), then \(\theta=\)AP EAMCET 2020 Medium