Dual Nature of Matter and Radiation-Photoelectric Effect (KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 4 - 7 of 9

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Question number: 4

» Dual Nature of Matter and Radiation » Photoelectric Effect

Appeared in Year: 2013

MCQ▾

Question

A singly ionized helium atom in an excited state (n = 4) emits a photon of energy 2.6 eV. Given that the ground state energy of hydrogen atom is -13.6 eV, the energy Equation and quantum number (n) of the resulting state are respectively,

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 5

» Dual Nature of Matter and Radiation » Photoelectric Effect

Appeared in Year: 2015

MCQ▾

Question

A 160 watt infrared source is radiating light of wavelength 50000 Å uniformly in all directions. The photon flux at a distance of 1.8m is of the order of,

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 6

» Dual Nature of Matter and Radiation » Photoelectric Effect

MCQ▾

Question

The wavelength of the first line of Balmer series is 6134 Å. The wavelength of the first line of Lyman series is –

Choices

Choice (4) Response

a.

3008 Å

b.

3607 Å

c.

2678 Å

d.

3408 Å

Question number: 7

» Dual Nature of Matter and Radiation » Photoelectric Effect

MCQ▾

Question

If the wavelength of photon emitted due to transition of electron from third orbit to first orbit in a hydrogen atom is λ, then the wavelength of photon emitted due to transition of electron from fourth orbit to second orbit will be –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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