Find out the shortest wavelength of paschen series for H- atom
- \(\frac{9}{R}\)
- \(\frac{16}{R}\)
- \(\frac{144}{7R}\)
- \(\frac{7R}{144}\)
The Correct Option is A
Solution and Explanation
Top Questions on Bohr’s Model for Hydrogen Atom
- The wavelength of the first line in the Balmer series of hydrogen spectrum is 656 nm. What is the wavelength of the second line?
- CUET (UG) - 2025
- Chemistry
- Bohr’s Model for Hydrogen Atom
A hydrogen atom consists of an electron revolving in a circular orbit of radius r with certain velocity v around a proton located at the nucleus of the atom. The electrostatic force of attraction between the revolving electron and the proton provides the requisite centripetal force to keep it in the orbit. According to Bohr’s model, an electron can revolve only in certain stable orbits. The angular momentum of the electron in these orbits is some integral multiple of \(\frac{h}{2π}\), where h is the Planck’s constant.
- CBSE CLASS XII - 2025
- Physics
- Bohr’s Model for Hydrogen Atom
- In Bohr’s model of hydrogen atom, find the percentage change in the radius of its orbit when an electron makes a transition from \( n = 3 \) state to \( n = 2 \) state.
- CBSE CLASS XII - 2025
- Physics
- Bohr’s Model for Hydrogen Atom
- Observe the following data.
Ion Q4+ Xb+ Yc+ Zd+ Radius (pm) 53 66 40 100 Q4+, Xb+, Yc+, Zd+ are respectively
- AP EAPCET - 2025
- Chemistry
- Bohr’s Model for Hydrogen Atom
- The number of electrons with magnetic quantum number $m = 0$ in the elements with atomic numbers $Z = 24$ and $Z = 29$ are respectively
- AP EAPCET - 2025
- Chemistry
- Bohr’s Model for Hydrogen Atom
Questions Asked in JEE Main exam
The velocity-time graph of an object moving along a straight line is shown in the figure. What is the distance covered by the object between \( t = 0 \) to \( t = 4s \)?
- JEE Main - 2025
- Kinetic Energy
- If the system of equations \[ (\lambda - 1)x + (\lambda - 4)y + \lambda z = 5 \] \[ \lambda x + (\lambda - 1)y + (\lambda - 4)z = 7 \] \[ (\lambda + 1)x + (\lambda + 2)y - (\lambda + 2)z = 9 \] has infinitely many solutions, then \( \lambda^2 + \lambda \) is equal to:
- JEE Main - 2025
- Matrices and Determinants
A bob of mass \(m\) is suspended at a point \(O\) by a light string of length \(l\) and left to perform vertical motion (circular) as shown in the figure. Initially, by applying horizontal velocity \(v_0\) at the point ‘A’, the string becomes slack when the bob reaches at the point ‘D’. The ratio of the kinetic energy of the bob at the points B and C is:
- JEE Main - 2025
- Kinetic Energy
- The number of different 5 digit numbers greater than 50000 that can be formed using the digits 0, 1, 2, 3, 4, 5, 6, 7, such that the sum of their first and last digits should not be more than 8, is:
- JEE Main - 2025
- permutations and combinations
- A bar magnet has total length \( 2l = 20 \) units and the field point \( P \) is at a distance \( d = 10 \) units from the centre of the magnet. If the relative uncertainty of length measurement is 1%, then the uncertainty of the magnetic field at point P is:
- JEE Main - 2025
- Magnetic Field
JEE Main Notification
GMC Azamgarh Admission 2025: Dates, Courses, Fees, Eligibility, SelectJuly 22, 2025