Dual Nature of Radiation and Matter Test

Result

Dual Nature of Radiation and Matter Test - 29

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Weekly Quiz Competition

Question 1
4 / -1

A photon having energy 5.5 eV is incident on metal surface and emits photo electrons having maximum kinetic energy 0.4 eV. Then stopping potential of this electron is..................

A
5.5 eV

B
5.1 eV

C
5.9 eV

D
4.0 eV
Question 2
4 / -1

Frequency of photon having energy 66 eV is............ (h = 6.625 × 10^–34 J.s)

A
8 × 10^–15 Hz

B
12 × 10^–15 Hz

C
16 × 10^–15 Hz

D
24 × 10^–15 Hz

Solution
Question 3
4 / -1

Kinetic energy of proton accelerated under p.d. 1 V will be................

A
1840 eV

B
13.6 eV

C
1 eV

D
0.54 eV
Question 4
4 / -1

Which of the following phenomenon can not be explained by quantum theory of light ?

A
Emission of radiation from black body

B
Photo electric effect

C
Polarisation

D
Crompton effect
Question 5
4 / -1

What will be velocity of light of particle having mass double than its rest mass ?

A

B

C

D

Solution
Question 6
4 / -1

If de-Broglie wavelength of electron is increased by 1 % its momentum................

A
increases by 1%

B
decreases by 1%

C
increased by 2%

D
decreases by 2%

Solution
Question 7
4 / -1

With how much p.d. should an electron be accelerated, so that its de-Broglie wavelength is 0.4 Å

A
9410 V

B
94.10 V

C
9.140 V

D
941.0 V

Solution
Question 8
4 / -1

de-Broglie wavelength of atom at T K absolute temperature will be....................

A

B

C

D
Question 9
4 / -1

Uncertainty of momentum of particle is 10^–30 kg ms^–1 so minimum uncertainty in its position is.........m.

A
10^–8 m

B
10^–12 m

C
10^–16 m

D
10^–4 m
Question 10
4 / -1

An electron is accelerated between two points having potential 20 V and 40 V, de- Broglic wavelength of electron is..................

A
0.75 Å

B
7.5 Å

C
2.75 Å

D
0.75 nm

Solution