Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 98

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Question 1
4 / -1

A proton, a deutron and anα–particle having the same momentum, enters a region of uniform electric field between the parallel plates of a capacitor. The electric field is perpendicular to the initial path of the particles. Then the ratio of deflections suffered by them is

A
1 : 2 : 8

B
1 : 2 : 4

C
1 : 1 : 2

D
None of these

Solution
Question 2
4 / -1

In order to coincide the parabolas formed by singly ionized ions in one spectrograph and doubly ionized ions in the other Thomson\'s mass spectrograph, the electric fields and magnetic fields are kept in the ratios 1 : 2 and 3 : 2 respectively. Then the ratio of masses of the ions is

A
3 : 4

B
1 : 3

C
9 : 4

D
None of these

Solution
Question 3
4 / -1

Let λ_α,λ_βand λ\'_α denote the wavelengths of the X-rays of the K_α, K_β and L_α, lines in the characteristic X-rays for a metal. Then

A
λ_α>λ’_α>λ_β

B
λ’_α>λ_β>λ_α

C

D

Solution
Question 4
4 / -1

The curve drawn between velocity and frequency of photon in vacuum will be a

A
Straight line parallel to frequency axis

B
Straight line parallel to velocity axis

C
Straight line passing through origin and making an angle of 45° with frequency axis

D
Hyperbola

Solution
Question 5
4 / -1

Which of the following figure represents the variation of particle momentum and the associated de-Broglie wavelength?

A

B

C

D

Solution
Question 6
4 / -1

According to Einstein\'s photoelecric equation the graph between the kinetic energy of photoelectrons ejected and the frequency of incident radiation is

A

B

C

D

Solution
Question 7
4 / -1

For the photoelectric effect, the maximum kinetic energy E_kof the emitted photoelectrons is plotted against the frequency v of the incident photons as shown in the figure. The slope of the curve gives

A
Charge of the electron

B
Work function of the metal

C
Planck's constant

D
Ratio of the Planck's constant to electronic charge

Solution
Question 8
4 / -1

The stopping potential V for photoelectric emission from a metal surface is plotted along Y-axis and frequency v of incident light along X-axis. A straight line is obtained as shown. Planck\'s constant is given by

A
Slope of the line

B
Product of slope on the line and charge on the electron

C
Product of intercept along Y-axis and mass of the electron

D
Product of slope and mass of electron

Solution
Question 9
4 / -1

In an experiment on photoelectric effect the frequency f of the incident light is plotted against the stopping potential V₀. The work function of the photoelectric surface is given by (e is electronic charge)

A
OB × e in eV

B
OB in volt

C
OA in eV

D
The slope of the line AB

Solution
Question 10
4 / -1

The stopping potential as a function of the frequency of the incident radiation is plotted for two different photoelectric surfaces A and B. The graphs show that work function of A is

A
Greater than that of B

B
Smaller than that of B

C
Equal to that of B

D
No inference can be drawn about their work functions from the given graphs