Dual Nature of Matter and Radiation-Einstein's Photoelectric Equation (NEET Physics): Questions 8 - 11 of 11

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Question number: 8

» Dual Nature of Matter and Radiation » Einstein's Photoelectric Equation

MCQ▾

Question

The work function for the surface of aluminum is 4.2 eV. What will be the wavelength of that incident light for which the stopping potential will be 0? (h = 6.6 ×10 -34 J-s, e = 1.6 × 10 -19)

Choices

Choice (4) Response
a.

2946 Å

b.

2496 Å

c.

2649 Å

d.

2946 × 10 -7 m

Passage

A physicist wishes to eject electrons by shining light on a metal surface. The light source emits light of wavelength of 450 nm. The table lists the only available metals and their work functions.

List of metals and their work function

In above table lists of available metals and their work function is given

Metal

W 0 (eV)

Barium

2.5

Lithium

2.3

Tantalum

4.2

Tungsten

4.5

Question number: 9 (1 of 3 Based on Passage) Show Passage

» Dual Nature of Matter and Radiation » Einstein's Photoelectric Equation

MCQ▾

Question

Which option correctly identifies the metal that will produce the most energetic electrons and their energies?

Choices

Choice (4) Response
a.

Lithium, 2.30 eV

b.

Tungsten, 1.75 eV

c.

Lithium, 0.45 eV

d.

Tungsten, 2.75 eV

Question number: 10 (2 of 3 Based on Passage) Show Passage

» Dual Nature of Matter and Radiation » Einstein's Photoelectric Equation

MCQ▾

Question

Which metal (s) can be used to produce electrons by the photoelectric effect from given source of light?

Choices

Choice (4) Response
a.

Lithium, tantalum or tungsten

b.

Barium or lithium

c.

Tungsten or tantalum

d.

Barium only

Question number: 11 (3 of 3 Based on Passage) Show Passage

» Dual Nature of Matter and Radiation » Einstein's Photoelectric Equation

MCQ▾

Question

Suppose photoelectric experiment is done separately with these metals with light of wavelength 450 nm. The maximum magnitude of stopping potential amongst all the metals is-

Choices

Choice (4) Response
a.

0.45 volt

b.

4.5 volt

c.

2.75 volt

d.

0.25 volt

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