Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 28

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

Energy of photon of light having two different frequencies are 2 eV and 10 eV respectively. If both are incident on the metal having work function 1 eV, ratio of maximum velocities of emitted electron is.................

A
1 : 5

B
3 : 11

C
2 : 9

D
1 : 3
Question 2
4 / -1

What will be velocity of particle having mass 3 times the rest mass ? (c = 3 × 10⁸ m/s)

A
1.83 × 10⁸ m/s

B
0.92 × 10⁸ m/s

C
2.83 × 10⁸ m/s

D
5.66 × 10⁸ m/s
Question 3
4 / -1

De-Broglie wavelength of particle moving at a 1/4 th of speed of light having rest mass m₀ is.........

A

B

C

D

Solution
Question 4
4 / -1

Work function of metal is 2.5 eV. If wave length of light incident on metal plate is 3000 Å , stopping potential of emitted electron will be.............

A
0.82 v

B
0.41 v

C
1.64 v

D
3.28 v

Solution
Question 5
4 / -1

An electron enters perpendicularly into uniform magnetic field having magnitude 0.5 × 10^–4 T . If it moves on a circular path of radius 2 mm, its de - Broglie wavelength is ......... Å

A
3410

B
4140

C
2070

D
2785
Question 6
4 / -1

In photoelectric effect, work function of mateal is 3.5 eV. By applying - 1.2V potential, photo electric current becomes zero, so..........

A
energy of incident photon is 4.7 eV.

B
energy of incident photon is 2.3 eV

C
If photon having higher frequency is used, photo electric current is produced.

D
When energy of photon is 2.3 eV, photo electric current becomes maximum

Solution
Question 7
4 / -1

Work function of tungsten and sodium are 4.5 eV and 2.3 eV respectively. If threshold wavelength for sodium is 5460 A, threshold frequnecy for tungsten will be................

A
10¹⁵ Hz

B
1.1 × 10¹⁵ Hz

C
1.2 × 10¹⁵ Hz

D
1.4 × 10¹⁵ Hz

Solution
Question 8
4 / -1

Ration of momentum of photons having wavelength 4000 Å & 8000 Å is..............

A
2 : 1

B
1 : 2

C
20 : 1

D
1 : 20

Solution
Question 9
4 / -1

Work function of metal is 4.2 eV. If ultraviolet radiation (photon) having energy 6.2 eV, stopping potential will be..................

A
2 eV

B
2 V

C
4.0V

D
10.4 eV

Solution
Question 10
4 / -1

If intensity of incident light is increased,.........of photo electrons will increase.

A
number

B
Frequency

C
energy

D
wavelength