KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics: Questions 224 - 226 of 268

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Question number: 224

» Kinetic Theory of Gases » Heat Capacities and Its Relations

Appeared in Year: 2014

MCQ▾

Question

One mole of a monoatomic ideal gas is expanded by a process described by PV3=C where C is a constant. The heat capacity of the gas during the process is given by (R is the gas constant).

Choices

Choice (4) Response

a.

2R

b.

R

c.

52R

d.

32R

Question number: 225

» Oscillations and Waves » Simple Pendulum

Appeared in Year: 2015

MCQ▾

Question

A simple pendulum of length l is made to oscillate with amplitude of 45 degrees. The acceleration due to gravity is g. Let T0=2πlg . The time period of oscillation of this pendulum will be

Choices

Choice (4) Response

a.

Slightly more than T0.

b.

Slightly less than T0.

c.

T0 irrespective of the amplitude.

d.

Dependent on whether it swings in a plane aligned with the north – south or east – west directions.

Question number: 226

» Ray Optics » Snell's Law

Appeared in Year: 2014

MCQ▾

Question

The angles of incidence and refraction of a monochromatic ray of light of wavelength λ at an air-glass interface are i and r, respectively. A parallel beam of light with a small spread δλ in wavelength about a mean wavelength λ is refracted at the same air-glass interface. The refractive index µ of glass depends on the wavelength λ as μ(λ)=a+bλ2 where a and b are constants. Then the angular spread in the angle of refraction of the beam is –

Choices

Choice (4) Response

a.

2b(a+bλ2)siniλ3δλ

b.

Siniλ3cosrδλ

c.

2btanraλ3+bλδλ

d.

2bλ3δλ

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