Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 4

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Weekly Quiz Competition

Question 1
4 / -1

X-rays are diffracted from a crystal of lattice plane spacing 2Å. The maximum wavelength that can be diffracted is

A
1 Å

B
2 Å

C
2.5 Å

D
4 Å
Question 2
4 / -1

X-rays of wavelength λ = 2 Å is emitted from the metal target. The potential difference applied across the cathode and the metal target is

A
5525 V

B
320 V

C
6200 V

D
3250 V
Question 3
4 / -1

The maximum kinetic energy of the photoelectrons depends only on

A
potential

B
frequency

C
incident angle

D
pressure
Question 4
4 / -1

Find the maximum wavelength of the light that will excite an electron in the valence band of diamond to the conduction band. The energy gap is 5.5 eV.

A
225 nm

B
315 nm

C
352 nm

D
412 nm
Question 5
4 / -1

Which of the following device is the application of photoelectric effect ?

A
Light emitting diode

B
Diode

C
Photocell

D
Transistor
Question 6
4 / -1

What should be the velocity of an electron so that, its momentum becomes equal to that of a photon of wavelength 5200 Å ?

A
700 m/s

B
1000 m/s

C
1400 m/s

D
2800 m/s
Question 7
4 / -1

The work function for aluminium is 4.125 eV. The cut-off wavelength for photoelectric effect for aluminium will be

A
420 nm

B
350 nm

C
300 nm

D
200 nm
Question 8
4 / -1

Calculate the linear momentum of a 3 MeV photon

A
0.01 eV–s/m

B
0.02 eV–s/m

C
0.03 eV–s/m

D
0.0 eV–s/m
Question 9
4 / -1

The photoelectric effect represents that

A
light has a particle nature

B
electron has a wave nature

C
proton has a wave nature

D
None of the above
Question 10
4 / -1

The linear momentum of photon is p. The wavelength of photon is λ , then (h is Planck's constant)

A
λ = hp

B

C

D