Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 64

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Weekly Quiz Competition

Question 1
4 / -1

A point source of light is used in an experiment on photoelectric effect. Which of the following curves best represent the variation of photo current (i) with distance (d) of the source from the emitter

A
a

B
b

C
c

D
d

Solution
Question 2
4 / -1

According to Einstein\'s photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal versus the frequency, of the incident radiation gives a straight line whose slope

A
Is the same for all metals and independent of the intensity of the radiation

B
Depends on the intensity of the radiation

C
Depends both on the intensity of the radiation and the metal used

D
Depends on the nature of the metals used

Solution
Question 3
4 / -1

The stopping potential (V₀) versus frequency (v) plot of a substance is shown in figure the threshold wave length is

A
5 × 10¹⁴ m

B
6000 Å

C
5000 Å

D
Cannot be estimated from given data

Solution
Question 4
4 / -1

Figure represents a graph of kinetic energy (K) of photoelectrons (in eV and frequency (v) for a metal used as cathode in photoelectric experiment. The work function of metal is

A
1 eV

B
1.5 eV

C
2 eV

D
3 eV
Question 5
4 / -1

Figure represents the graph of photo current I versus applied voltage (V). The maximum energy of the emitted photoelectrons is

A
2 eV

B
4 eV

C
0 eV

D
4 J

Solution
Question 6
4 / -1

The graph that correctly represents the relation of frequency v of a particular characteristic X-ray with the atomic number Z of the material is

A

B

C

D

Solution
Question 7
4 / -1

The intensity distribution of X-rays from two coolidge tubes operated on different voltages V₁ and V₂ and using different target materials of atomic numbers Z₁ and Z₂ is shown in the figure. Which one of the following inequalities is true

A
V₁ > V₂ , Z₁ < Z₂

B
V₁ > V₂ , Z₁ > Z₂

C
V₁ < V₂ , Z₁ > Z₂

D
V₁ = V₂ , Z₂ < Z₂

Solution
Question 8
4 / -1

The correct graph between the maximum energy of a photoelectron and the inverse of wavelength of the incident radiation is given by the curve

A
A

B
B

C
C

D
None of these

Solution
Question 9
4 / -1

The continuous X-ray spectrum obtained from a Coolidge tube is of the form

A

B

C

D

Solution
Question 10
4 / -1

The dependence of the short wavelength limit λ_min on the accelerating potential V is represented by the curve of figure

A
A

B
B

C
C

D
None of these

Solution