Dual Nature of Radiation and Matter Test

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Dual Nature of Radiation and Matter Test - 50

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Weekly Quiz Competition

Question 1
4 / -1

For intensity I of a light of wavelength 5000 Å the photoelectron saturaiton current is 0.40 µA and stopping potential is 1.36 V, the work function of metal is

A
2.47 eV

B
1.36 eV

C
1.10 eV

D
0.43 eV

Solution
Question 2
4 / -1

The work function of aluminium is 4.2 eV. If two photons, each of energy 3.5 eV strike an electron of aluminium, then emission of electrons will be

A
Possible

B
Not possible

C
Data is incomplete

D
Depends upon the density of the surface
Question 3
4 / -1

In photoelectric effect if the intensity of light is doubled then maximum kinetic energy of photoelectrons will become

A
Double

B
Half

C
Four times

D
No change
Question 4
4 / -1

Light of frequency v is incident on a substance of threshold frequency v₀(v₀ < v). The energy of the emitted photoelectron will be

A
h (v – v₀)

B
h /v

C
he (v – v₀)

D
h /v₀
Question 5
4 / -1

The stopping potential (V₀)

A
Depends upon the angle of incident light

B
Depends upon the intensity of incident light

C
Depends upon the surface nature of the substance

D
Is independent of the intensity of the incident light
Question 6
4 / -1

When wavelength of incident photon is decreased then

A
Velocity of emitted photoelectron decreases

B
Velocity of emitted photoelectron increases

C
Velocity of photoelectron do not change

D
Photo electric current increases
Question 7
4 / -1

Quantum nature of light is explained by which of the following phenomenon

A
Huygen wave theory

B
Photoelectric effect

C
Maxwell electromagnetic theory

D
de-Broglie theory
Question 8
4 / -1

When a metal surface is illuminated by light of wavelengths 400 nm and 250 nm, the maximum velocities of the photoelectrons ejected are v and 2v respectively. The work function of the metal is (h = Planck\'s constant, c = velocity of light in air)

A
2 hc × 10⁶ J

B
1.5 hc × 10⁶ J

C
hc × 10⁶ J

D
0.5 hc × 10⁶ J

Solution
Question 9
4 / -1

The incident photon involved in the photoelectric effect experiment

A
Completely disappears

B
Comes out with an increased frequency

C
Comes out with a decreased frequency

D
Comes out without change in frequency
Question 10
4 / -1

If intensity of incident light is increased in PEE then which of the following is true

A
Maximum K. E. of ejected electron will increase

B
Work function will remain unchanged

C
Stopping potential will decrease

D
Maximum K. E. of ejected electron will decrease

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Dual Nature of Radiation and Matter Test - 50

Result

Dual Nature of Radiation and Matter Test - 50

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SHARING IS CARING

Question 1

2.47 eV

1.36 eV

1.10 eV

0.43 eV

Solution

Question 2

Possible

Not possible

Data is incomplete

Depends upon the density of the surface

Question 3

Double

Half

Four times

No change

Question 4

h (v – v0)

h /v

he (v – v0)

h /v0

Question 5

Depends upon the angle of incident light

Depends upon the intensity of incident light

Depends upon the surface nature of the substance

Is independent of the intensity of the incident light

Question 6

Velocity of emitted photoelectron decreases

Velocity of emitted photoelectron increases

Velocity of photoelectron do not change

Photo electric current increases

Question 7

Huygen wave theory

Photoelectric effect

Maxwell electromagnetic theory

de-Broglie theory

Question 8

2 hc × 106 J

1.5 hc × 106 J

hc × 106 J

0.5 hc × 106 J

Solution

Question 9

Completely disappears

Comes out with an increased frequency

Comes out with a decreased frequency

Comes out without change in frequency

Question 10

Maximum K. E. of ejected electron will increase

Work function will remain unchanged

Stopping potential will decrease

Maximum K. E. of ejected electron will decrease

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h (v – v₀)

he (v – v₀)

h /v₀

2 hc × 10⁶ J

1.5 hc × 10⁶ J

hc × 10⁶ J

0.5 hc × 10⁶ J