MCQ
Who gave the Quantum model of hydrogen atom?
  • A
    S.N. Bose
  • B
    Niels Bohr
  • C
    James clerk Maxwell
  • D
    R. A. Millikan

Answer

  1. Niels Bohr

Explanation:

Niels Bohr introduced the atomic Hydrogen model in 1913.

Neils Bohr developed the Bohr model of the atom, in which he proposed that energy levels of electrons are discrete and that the electrons revolve in stable orbits around the atomic nucleus but can jump from one energy level (or orbit) to another.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Voltage in the secondary coil of a transformer does not depend upon.

(a) Voltage in the primary coil

(b) Ratio of number of turns in the two coils

(c) Frequency of the source

(d) Both (a) and (b)

Choose the correct statement about the properties of magnetic lines of forces.

The electric potential V is given as a function of distance x (metre) by )volt. Value of electric field at x = 1  is

(a) 20 V/m

(b) 6 V/m

(c) 11 V/m

(d) -23 V/m

A certain charge liberates 0.8 gm of . The same charge will liberate how many gm of silver

(a) 108 gm

(b) 10.8 gm

(c) 0.8 gm

(d)  

Consider telecommunication through optical fibres.  Which of the following statements is not true

(a) Optical fibres may have homogeneous core with a suitable cladding

(b) Optical fibres can be of graded refractive index

(c) Optical fibres are subject to electromagnetic interference from outside

(d) Optical fibres have extremely low transmission loss

What is the electric potential at the perpendicular bisector of an electric dipole?
A standing wave is produced on a string clamped at one end and free at the other. The length of the string.
  1. Must be an integral multiple of $\frac{\lambda}{4}$
  2. Must be an integral multiple of $\frac{\lambda}{2}$
  3. Must be an integral multiple of $\lambda$
  4. May be an integral multiple of $\frac{\lambda}{2}.$

The photoelectric work function for a metal surface is 4.125 eV. The cut-off wavelength for this surface is

(a) 4125 Å

(b) 2062.5 Å

(c) 3000 Å

(d) 6000 Å

In an intrinsic semiconductor, conductivity is:
An AC source producing emf $\in=\in_{0}\Big[\cos\big(100\pi\text{s}^{-1}\big)\text{t}+\cos\big(500\pi\text{s}^{-1}\big)\text{t}\Big]$ is connected in series with a capacitor and a resistor. The steady-state current in the circuit is found to be $\text{i}=\text{i}_1\cos\Big[\big(100\pi\text{s}^{-1}\big)\text{t}+\phi_1\Big]+\text{i}_2\cos\Big[\big(500\pi\text{s}^{-1}\big)\text{t}+\phi_2\Big].$