Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 88

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Weekly Quiz Competition

Question 1
4 / -1

The velocity of photon is proportional to (where v is frequency)

A

B

C

D

Solution
Question 2
4 / -1

The ratio of the energy of a photon with λ = 150 nm tothat with λ = 300 nm is

A
2

B
1/4

C
4

D
1/2

Solution
Question 3
4 / -1

The threshold frequency for a metallic surface corresponds to an energy of 6.2 eV and the stopping potential for a radiation incident on this surface is 5V.the incident radiation lies in

A
Infra-red region

B
Visible region

C
X-ray region

D
Ultraviolet region

Solution
Question 4
4 / -1

If the threshold wavelenght for sodium is 5420 Å, then the work function of sodium is

A
4.58 eV

B
2.28 eV

C
1.14 eV

D
0.23 eV

Solution
Question 5
4 / -1

The work function of a metal is

A
The energy for the electron to enter into the metal

B
The energy for producing X-ray

C
The energy is required for an electron to come out from metal surface

D
None of the above
Question 6
4 / -1

The minimum wavelength of photon is 5000 Å, its energy will be

A
2.5 eV

B
50 V

C
5.48 eV

D
7.48 eV

Solution
Question 7
4 / -1

Which of one is correct?

A
E²= p²c²

B
E² = p²c

C
E² = pc²

D
E² = p² /c²

Solution
Question 8
4 / -1

The work function for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einstein\'s equation, the metals which will emit photo electrons for a radiation of wavelength 4100 A is/are

A
None of these

B
A only

C
A and B only

D
All the three metals

Solution
Question 9
4 / -1

A source S₁ is producing 10¹⁵ photons per second of wavelength 5000 Å. Another source S₂ is producing 1.02 × 10¹⁵ photons per second of wavelength 5100 Å.Then (power of S₂)/(power of S₁) is equal to

A
0.98

B
1.00

C
1.02

D
1.04

Solution
Question 10
4 / -1

When monochromatic radiation of intensity I falls on a metal surface, the number of photoelectron and their maximum kinetic energy are N and T respectively. If the intensity of radiation is 2/, the number of emitted electrons and their maximum kinetic energy arerespectively

A
N and 2T

B
2N and T

C
2N and 2T

D
N and T

Solution