NEET Physics: Questions 1423 - 1426 of 2098

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Question number: 1423

» Atoms and Nuclei » Hydrogen Spectrum

MCQ▾

Question

When a hydrogen atom is raised from the ground state to an excited state

Choices

Choice (4) Response

a.

P. E. increases and K. E. decreases

b.

kinetic energy and potential energy increase

c.

K. E. and P. E. decrease

d.

P. E. decreases and K. E. increases

Question number: 1424

» Properties of Solids & Liquids » Latent Heat

MCQ▾

Question

A bullet moving with a uniform velocity v, stops sudden after hitting the target and the whole mass melts be m, specific heat S, initial temperature 25°C, melting point 475 °C and the latent heat L. Then v is given by

Choices

Choice (4) Response

a.

mS(47525)+mL=12mv2J

b.

mS(47525)+mL=12mv2J

c.

mS(47525) mL=12mv2J

d.

mL=mS(47525)+12mv2J

Question number: 1425

» Wave Optics » Polarization

Assertion-Reason▾

Assertion (Ꭺ)

The unpolarised light and polarised light can be distinguished from each other by using polaroid.

Reason (Ꭱ)

A polaroid is capable of producing plane polarised beams of light.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are false

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 1426

» Thermodynamics » Thermal Equilibrium

MCQ▾

Question

For an isothermal expansion of a perfect gas, the value of PP is

Choices

Choice (4) Response

a.

VV

b.

γ2VV

c.

γ12VV

d.

γVV

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