MCQ
de-Broglie wavelength ($ \lambda $) of different particles having same kinetic energy depends on their mass as :
- A$ \lambda \propto m $
- B$ \lambda \propto m^{1/2} $
- C$ \lambda \propto m^{-1} $
- ✓$ \lambda \propto m^{-1/2} $
✓
Answer
Correct option: D.
$ \lambda \propto m^{-1/2} $
D
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
'Albedo' is
|
(a) Reflecting power of a heavenly body |
|
(b) Transmitive power of a heavenly body |
|
(c) Absorptive power of a heavenly body |
|
(d) Refracting power of a heavenly body |
Two voltameters, one of copper and another of silver, are joined in parallel. When a total charge q flows through the voltameters, equal amount of metals are deposited. If the electrochemical equivalents of copper and silver are 
and 
respectively the charge which flows through the silver voltameter is
|
(a) |
(b) |
(c) |
(d) |
100 mA current gives a full scale deflection in a galvanometer of 2Ω resistance. The resistance connected with the galvanometer to convert it into a voltmeter to measure 5V is
|
(a) 98 Ω |
(b) 52 Ω |
(c) 50 Ω |
(d) 48 Ω |
Two point charges Q and – 3Q are placed at some distance apart. If the electric field at the location of Q is E then at the locality of -3Q, it is
|
(a) - E |
(b) E/3 |
(c) -3E |
(d) -E/3 |
A paramagnetic sample shows a net magnetisation of 8Am-1 when placed in an external magnetic field of 0.6T at a temperature of 4K. When the same sample is placed in an external magnetic field of 0.2T at a temperature of 16K, the magnetisation will be
The diode shown in the circuit is a silicon diode. The potential difference between the points A and B will be
|
(a) 6 V |
(b) 0.6 V |
(c) 0.7 V |
(d) 0 V |
A charged particle moves in a gravity-free space without change in velocity. Which of the following is are possible:
A uniform rod is kept vertically on a horizontal smooth surface at a point O. If it is rotated slightly and released, it falls down on the horizontal surface. The lower end will remain:
→- At O.
- At a distance less than $\frac{\text{l}}2{}$ from O.
- At a distance $\frac{\text{l}}2{}$ from O.
- At a distance larger than $\frac{\text{l}}2{}$ from O.
The electric potential at a point (x, y) in the x - y plane is given by V = -kxy. The field intensity at a distance r from the origin varies as
|
(a) |
(b) r |
(c) |
(d) |
The significant result deduced from the Rutherford's scattering experiment is that: