Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 24

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Weekly Quiz Competition

Question 1
4 / -1

If velocity of free election is made double, change in its de-Broglie wavelength will be......

A

B

C

D

Solution
Question 2
4 / -1

de-Broglie wavelength of proton accelerated under 100 V electric potential difference is λ₀ . If de - wave length α - particle accelerated by the same electric potential difference will its bouglie ............

A

B

C

D

Solution
Question 3
4 / -1

Work function of a body is 4.0 eV. For emission of photo electron from body, maximum wavelength of light = ..........

A
540 nm

B
400 nm

C
310 nm

D
220 nm

Solution
Question 4
4 / -1

A body of mass 200 g moves at the speed of 5 m/hr. So de-Broglie wavelength related to it is of the order........ (h = 6.626 × 10^–34 J - s)

A
10^–10 m

B
10^–20 m

C
10^–30 m

D
10^–40 m

Solution
Question 5
4 / -1

Photo electric effect on surface is found for frequencies 5.5 × 10⁸ MHz and 4.5 × 10⁸ MHz If ratio of maximum kinetic energies of emitted photo electrons is 1 : 5, threshold frequency for metal surface is................

A
7.55 × 10⁸ MHz

B
4.57 × 10⁸ MHz

C
9.35 × 10⁸ MHz

D
5.75 × 10⁸ MHz

Solution
Question 6
4 / -1

For wave concerned with proton, de - Broglie wavelength change by 0.25% . If its momentum changes by P_O initial momentum = ........

A
100 P_o

B

C
401 P_o

D

Solution
Question 7
4 / -1

According to Einstein\'s photoelectric equation, graph of kinetic energy of emitted photo electrons from metal versus frequency of incident radiation is linear. Its shope.............

A
depends on type of metal used

B
depends on intensity of radiation

C
depends on both metal used and intensity of radiation.

D
is same for all metals and free from intensity of radiation.
Question 8
4 / -1

Energy corresponding to threshold frequency of metal is 6.2 eV. If stopping potential corresponding to radiation incident on surface is 5V, incident radiation will be in the.....region.

A
X-ray

B
Ultraviolet

C
infrared

D
Visible
Question 9
4 / -1

At 10^oC temperature, de-Broglie wave length of atom is 0.4Å . If temperature of atom is increased by 30^oC , what will be change in de-Broglie wavelength of atom ?

A
decreases 10^–2 Å

B
decreases 2 × 10^–2 Å

C
increases 10^–2 Å

D
increases 2 × 10^–2 Å

Solution
Question 10
4 / -1

Wavelength of incident radiation on photo sensitive surface is changed from 4000 Å to 3000 Å , so change in stopping potential will be.......

A
0.345 V

B
0.435 V

C
0.543 V

D
0.534 V

Solution