Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 31

Score
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Weekly Quiz Competition

Question 1
4 / -1

The de-Broglie wavelength associated with a particle with rest mass 0 m and moving with speed of light in vacuum is..................

A

B
0

C
∞

D

Solution
Question 2
4 / -1

A proton and electron are lying in a box having unpenetrable walls, the ratio of uncertainty in their velocities are........( m_e = mass of electron and m_p = mass of proton.)

A

B

C

D
Question 3
4 / -1

Photons of energy 1 eV and 2.5 ev successively illuminate a metal, whose work function is 0.5 eV, the ratio of maximum speed of emitted electron is..........................

A
1 : 2

B
2 : 1

C
3 : 1

D
1 : 3

Solution
Question 4
4 / -1

The uncertainty in position of a particle is same as its de-Broglie wavelength, uncertainty in its momentum is.......................

A

B

C

D

Solution
Question 5
4 / -1

Wavelength of an electron having energy 10 keV is....... Å

A
0.12

B
1.2

C
12

D
120

Solution
Question 6
4 / -1

Wavelength λ_A and λ_B are incident on two identical metal plates and photo electrons are emitted. If λ_a = 2λ_B , the maximum kinetic energy of photo electrons is................

A

B

C

D

Solution
Question 7
4 / -1

The de-Broglie wave length of a particle having velocity of 2.25 × 10⁸ ms^–1, is the same value of a photon wavelength, then the ratio of kinetic energy and photon energy of the particle is ......(c = 3 × 10⁸ ms^–1 )

A

B

C

D

Solution
Question 8
4 / -1

The ration of de - Begli wavelengths of molecules of hydrogen and helium which are at temperature 27^o and 127^oC respectively is...................

A

B

C

D
1

Solution
Question 9
4 / -1

A photon, an electron and a uranium nucleus all have same wavelength. The one with the most energy..................

A
is the photon

B
is the electron

C
is the uranium nucleus

D
depends upon the wavelength and properties of the particle.
Question 10
4 / -1

A light of frequency 1.5 times the threshold frequency is incident on photo-sensitive material. If the frequency is halved and intensity is doubled, the photoelectric current becomes....................

A
zero

B
doubled

C
quadrupled

D
halved

Solution