M.C.Qs. wave nature of matter
It consists of numerical problems related to dual nature of radiations and matter in the 12th physics unit (7).
Problem: 01
1. The momentum of a photon of wavelength 5,000 Ao will be
(A) 1.3 x 10-27 Kg m s-1 (B) 1.3 x 10-28 Kg m s-1 (C) 4 x 10-29 Kg m s-1 (D) 4 x 10-18 Kg m s-1
M.C.Qs. wave nature of matter
Problem: 02
2. What is the de-Broglie wavelength of 1 Kg mass moving with a velocity of 10 ms-1?
(A) 6.626 x 10-35 m (B) 6.626 x 10-33 m (C) 6.626 x 10-34 m (D) None of the above
M.C.Qs. wave nature of matter
Problem: 03
3. The wavelength of a particle having a momentum of 2 x 10-28 Kg m s-1 is
(A) 3.3 x 10-6 m (B) 3.3 x 10-5 m (C) 3.3 x 10-4 m (D) 30 m
M.C.Qs. wave nature of matter
Problem: 04
4. If the momentum of a particle is doubled, then its de-Broglie wavelength will
(A) Remain unchanged (B) Become four times (C) Becomes two times (D) Becomes half
M.C.Qs. wave nature of matter
Problem: 05
5. The de-Broglie wavelength of an electron of energy 600 eV is
(A) 4 Ao (B) 20 Ao (C) 10 Ao (D) 0.5 Ao
M.C.Qs. wave nature of matter
Problem: 06
6. If we consider electrons and photons of the same wavelength, then they will have the same
(A) Energy (B) Velocity (C) Momentum (D) Angular momentum
M.C.Qs. wave nature of matter
Problem: 07
7. The kinetic energy of an electron, which is accelerated to the potential difference of 100 V, is
(A) 1.6 x 10-17 J (B) 1.6 x 104 J (C) 416.6 cal. (D) 6.636 cal.
M.C.Qs. wave nature of matter
Problem: 08
Problem: 09
9. The minimum wavelength of the X-rays produced by electrons accelerated by a potential difference of V volt is directly proportional to
M.C.Qs. wave nature of matter
Problem: 10
10. The de-Broglie wave corresponding to a particle of mass m and velocity v has a wavelength of associated with it
M.C.Qs. wave nature of matter
(A) h/mv
(B) hmv
(C) mh/v
(d) m/hv
Problem: 11
For electrons and photons of same de-Broglie wavelength, they will have same
M.C.Qs. wave nature of matter
(A) Energy
(B) velocity
(C) Momentum
(D) Angular momentum
Problem: 12
The momentum of a photon of energy 1 MeV in the units of Kg m s-1 will be
M.C.Qs. wave nature of matter
(A) 7.33 x 10-24
(B) 6.33 x 10-23
(C) 5.33 x 10-22
(D) 4.33 x 10-22
Problem: 13
Lemda is the de-Broglie wavelength of an electron of mass m when accelerated through a potential difference of V volt; the de-Broglie wavelength of the photon of mass M, when accelerated through the same potential difference, will be
M.C.Qs. wave nature of matter
Problem: 14
The kinetic energy of an electron is 100 eV. The de Broglie wavelength associated with the beam will be (given that the mass of the electron= 9.1 x 10-31 Kg, 1 eV = 1.6 x 10-19 J, and Plank’s constant is h = 6.6 x 10-34 J.s.).
M.C.Qs. wave nature of matter
(A) 6.23 x 10-10 m
(B) 1.22 x 10-10 m
(C) 12.2 x 10-10 m
(D) 2.46 x 10-10 m
Problem: 15
The de-Broglie wavelength associated with an electron in motion is 10-10 m. The speed of the electron will be
M.C.Qs. wave nature of matter
(A) 6.25 x 106 m s-1
(B) 7.25 x 106 m s-1
(C) 5.25 x 106 m s-1
(D) 4.25 x 106 m s-1
