KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 100 - 102 of 268

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Question number: 100

» Thermodynamics » Thermal Equilibrium

Appeared in Year: 2013

MCQ▾

Question

The bulk modulus of a gas is defined as B=VdPdV . For an adiabatic process the variation of B is proportional to Pn . For an ideal gas, n is –

Choices

Choice (4) Response

a.

52

b.

0

c.

2

d.

1

Question number: 101

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

Appeared in Year: 2013

MCQ▾

Question

An arrangement with a pair of quarter circular coils of radii r and R with a common centre C and carrying a current (I) are shown.

An arrangement with a pair of quarter circular coils

An Arrangement With a Pair of Quarter Circular Coils

Figure shows an arrangement with a pair of quarter circular coils of radii r and R with common centre C and it carrying current (I).

The permeability of free space is μ0. The magnetic field at C is –

Choices

Choice (4) Response

a.

μ0I8(1r+1R) out of the page

b.

μ0I8(1r1R) into the page

c.

μ0I8(1r1R) out of the page

d.

μ0I8(1r+1R) into the page

Question number: 102

» Laws of Motion » Equilibrium of Concurrent Forces

Appeared in Year: 2012

MCQ▾

Question

Two blocks (1 and 2) of equal mass m are connected by an ideal string (see figure below) over a frictionless pulley. The blocks are attached to the ground by springs having spring constants k1 and k2 such that k1 > k2.

Two blocks of equal mass attached with pulley

Two Blocks of Equal Mass Attached With Pulley

In figure two blocks (1 and 2) of equal mass m are connected by an ideal string over a frictionless pulley.

Initially, both springs are unstretched. The block 1 is slowly pulled down a distance x and released. Just after the release the possible value of the magnitudes of the acceleration of the blocks a1 and a2 can be –

Choices

Choice (4) Response

a.

Either (a1=a2=(k1k2)x2m) or (a1=a2=(k1k2)x(k1+k2)mg)

b.

Either (a1=a2=(k1+k2)x2m) or (a1=k1xmganda2=k2xm+g)

c.

(a1=a2=(k1k2)x2m)only

d.

(a1=a2=(k1+k2)x2m)only

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