NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1792 - 1796 of 2184

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Question number: 1792

» Oscillations and Waves » Displacement Relation for a Progressive Wave

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MCQ▾

Question

The equation of a progressive wave is given by where x and y are in meter and t is in second. The velocity of the wave is,

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1793

» Electronic Devices » Logic Gates (Or, and, NOT, NAND and Nor)

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MCQ▾

Question

To get an output 1 from the circuit shown in the figure, the input can be

Circuit diagram with three inputs and one output.

Circuit Diagram with Three Inputs and One Output.

In in circuit diagram three inputs (A, B, C) are connected with combination of OR and AND gates.

Choices

Choice (4) Response

a.

A = 1, B = 1, C = 0

b.

A = 1, B = 0, C = 0

c.

A = 1, B = 0, C = 1

d.

A = 0, B = 1, C = 0

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: 1794 (1 of 3 Based on Passage) Show Passage

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

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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.

4.5 volt

b.

0.25 volt

c.

0.45 volt

d.

2.75 volt

Question number: 1795 (2 of 3 Based on Passage) Show Passage

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

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MCQ▾

Question

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

Choices

Choice (4) Response

a.

Lithium, 0.45 eV

b.

Tungsten, 1.75 eV

c.

Lithium, 2.30 eV

d.

Tungsten, 2.75 eV

Question number: 1796 (3 of 3 Based on Passage) Show Passage

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

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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.

Barium only

b.

Lithium, tantalum or tungsten

c.

Barium or lithium

d.

Tungsten or tantalum