Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 32

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Weekly Quiz Competition

Question 1
4 / -1

An electron with rest mass m₀ moves with a speed of 0.8 C. Its mass, when it moves with this speed is...............

A
m₀

B

C

D

Solution
Question 2
4 / -1

The cathode of a photoelectric cell is changed such that the work function changes from W₁ to w₂ (W₁ >W₂) . If the currents before and after change are I₁ and I₂ , all other conditions remaining unchanged, then assuming hf > W₂ .............

A
I₁ = I₂

B
I₁ < I₂

C
I₁ > I₂

D
I₁ < I₂ < 2I₁
Question 3
4 / -1

The mass of a particle is 400 times than that of an electron and charge is double. The particle is accelerated by 5V. Initially the particle remained at rest, then its final kinetic energy is.................

A
5 eV

B
10 eV

C
100 eV

D
2000 eV
Question 4
4 / -1

The work function of a metal is 1 eV. Light of wavelength 3000 Å is incident on this metal surface. The maximum velocity of emitted photo election will be..................

A
10 ms^–1

B
10³ ms^–1

C
10⁴ ms^–1

D
10⁶ ms^–1

Solution
Question 5
4 / -1

The work function for tungsten and sodium are 4.5 eV and 2.3 eV respectively. If the threshold wavelength λ_o for sodium is 5460 Å the value of λ_o for tungsten is...

A
528 Å

B
2791 Å

C
5893 Å

D
10683 Å

Solution
Question 6
4 / -1

In the Davission and Germer\'s experiment the filament of electron gun is coated with.........

A
Cotton

B
BaO

C
Oil

D
FeO
Question 7
4 / -1

Suppose ψ(x, y, z) represents a particle in three dimensional space, then probility of finding the particle in the unit volume at a given point x,y,z is .........

A
inversely proportional to ψ(x, y, z)

B
directly proportional ψ *

C
directly proportional to | ψ ψ *|

D
inversely proportional to | ψ ψ *|
Question 8
4 / -1

Select the correct statement from the following

A
Radiantion and matter (particles) may not exhibit both the wave nature and particle nature simultaneously at the some moment.

B
At some moment electromagnetic waves get divided in to small pieces named particles

C
In a given circumstance a particle at one moment behaves like particle and the at the next moment as wave and so on

D
Each microscopic particle is envloped by a wave
Question 9
4 / -1

In which of the following phenomena the photon picture is required ?

A
Energy distribution in black body radiation

B
Compton scattering

C
Photoelectric effect

D
None of these
Question 10
4 / -1

Two identical detect 25 and 16 photons per second as shown in the Fig. ...... the ratio of the amplitudes of these light waves.

A

B

C

D

Solution