Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 3

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Weekly Quiz Competition

Question 1
4 / -1

The momentum of a photon of energy 1 MeV in kg -ms^-1 , will be

A
0.33 × 10⁶

B
7 × 10^-24

C
10^-22

D
5 × 10^-22
Question 2
4 / -1

The ratio of the de-Broglie wavelength of an α-particle and a proton of same kinetic energy is

A
1 : 2

B
1 : 1

C
1 : √2

D
4 : 1
Question 3
4 / -1

An electron is accelerated through a potential difference of V volt The speed of electrons will be

A

B

C

D
Question 4
4 / -1

If α, β and γ rays carry same momentum, which has the longest wavelength ?

A
α–rays

B
β–rays

C
γ–rays

D
None, all have same wavelength
Question 5
4 / -1

If the kinetic energy of a free electron doubles, its de-Broglie wavelength changes by the factor

A

B
2

C

D
Question 6
4 / -1

The de-Broglie wavelength of an electron is the same as that of a 50 keV X-ray photon. The ratio of the energy of the photon to the kinetic energy of the electron is (the energy equivalent of electron mass is 0.5 MeV)

A
1 : 50

B
1 : 2

C
20 : 1

D
50 : 1
Question 7
4 / -1

If a source of power 4 kW produces 10²⁰ photon/sec the radiation belong to a part of the spectrum called

A
X–rays

B
ultraviolet rays

C
microwaves

D
γ–rays
Question 8
4 / -1

The energy of an X–ray photon of wavelength 1 Å is (h = 6.6 × 10^-34 J-s)

A
24.6 keV

B
6.1 keV

C
12.3 keV

D
1.2 keV

Solution
Question 9
4 / -1

Which of the following supports the wave nature of X-rays?

A
Photoelectric effect

B
Photosynthesis

C
Compton scattering

D
Diffraction
Question 10
4 / -1

The potential difference applied to an X-ray tube is 5 kV, and the current through it is 3.2 mA. The number of electrons striking the target per sec is
(take, e =1.6 × 10^-19 C)

A
1.6 × 10⁶

B
2 × 10^-6

C
4 × 10¹⁶

D
2 × 10¹⁶

Solution