Download App

Dual Nature of Radiation and Matter — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsDual Nature of Radiation and Matter2 Marks
Question
A dbuteron and an alpha particle are accelerated with the same accelerating potential. Which one of the two has:
  1. Greater value of de-Broglie wavelength, associated with it and
  2. Less kinetic energy? Explain.
✓

Answer

  1. deutron

$\lambda = \frac{\text{h}}{\sqrt{2\text{mqV}}}$

$\frac{\lambda_d}{\lambda_{\alpha}}=\sqrt{\frac{m_\alpha{q_\alpha}}{m_d{q_d}}}=\sqrt{\frac{{2m_d}\times{2q_d}}{m_d{q_d}}}$

$=\frac{2}{1}$

$\Rightarrow\lambda_{d} > \lambda_{\alpha}$ 

  1. deuteron

KE = qV

$\therefore$ $q_{\alpha}>q_{d}$

for the same accelerating potential, we have

$(KE)_d>(KE){\alpha}$

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

Explore more

More "2 Marks Questions" from Dual Nature of Radiation and Matter→Dual Nature of Radiation and Matter — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Explain the change in the Energy gap of an intrinsic semiconductor, with temperature
→
Two electric dipoles whose dipole moments are $P$ and 64 P are placed on a line at a distance of 25 cm in opposite directions. If the electric field at any point between them is zero, then what will be the distance of this point from the electric potential $P$ ?
→
Explain the term ‘drift velocity’ of electrons in a conductor. Hence obtain the expression for the current through a conductor in terms of ‘drift velocity’.
→
Define ionisation energy. How would the ionsation energy change when electron in hydrogen atom is replaced by a particle of mass 200 times that of the electron but having the same charge?
→
Name the logic gate which can be realised by using a p-n junction diode in the given diagram. Give its logic symbol and write the truth table. Name the gate which will be obtained by combining with a NOT gate.

→
It is found experimentally that $13.6 eV$ energy is required to separate a hydrogen atom into a proton and an electron. Compute the orbital radius and the velocity of the electron in a hydrogen atom.
→
Draw a p-n junction which is reverse biased.
→
Find the dimensions of Planck's constant h from the equation E = hv where E is the energy and v is the frequency.
→
A circular coil of N turns and radius R carries a current I. It is unwound and rewound to make another coil of radius R/2, current I remaining the same. Calculate the ratio of the magnetic moments of the new coil and the original coil.
→
What will be the effect on induced charge and induced current when change in magnetic flux associated with it is either done with increased rate or decreased rate?
→