KVPY Stream-SA (Class 11) Physics: Questions 91 - 94 of 252

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Question number: 91

» Work, Energy and Power » Conservative and Non-Conservative Forces

MCQ▾

Question

A box, when hung from a spring balance shows a reading of 35 kg inside an evacuated chamber. If the same box is hung from the same spring balance outside an evacuated chamber, the reading on the scale will be,

Choices

Choice (4) Response

a.

35 kg because the effect of the absence of the atmosphere will be identical on the box and the spring balance

b.

35 kg because the mass of the box remains unchanged

c.

Less than 35 kg because the atmospheric buoyancy force will be present

d.

More than 35 kg because the spring constant is lower in air.

Question number: 92

» Magnetic Effects of Current and Magnetism » Bar Magnet

Appeared in Year: 2014

MCQ▾

Question

Two identical bar magnets are held perpendicular to each other with a certain separation, as shown below. The area around the magnets is divided into four zones

Two identical bar magnets held in four zones

Two Identical Bar Magnets Held in Four Zones

Figure shows two identical bar magnets are held perpendicular to each other with certain separation with in four zones.

Given that there is a neutral point it is located in

Choices

Choice (4) Response

a.

Zone III

b.

Zone II

c.

Zone I

d.

Zone IV

Question number: 93

» Laws of Motion » Momentum

MCQ▾

Question

A girl of 40 kg mass and a boy of 60 kg mass are moving with equal kinetic energies. What is the ratio of their momenta?

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 94

» Properties of Solids & Liquids » Application of Surface Tension

Appeared in Year: 2014

MCQ▾

Question

A box, when hung from a spring balance shows a reading of 50 kg. If the same box is hung from the same spring balance inside an evacuated chamber, the reading on the scale will be.

Choices

Choice (4) Response

a.

More than 50 kg because the atmospheric buoyancy force will be absent

b.

50 kg because the effect of the absence of the atmosphere will be identical on the box and the spring balance

c.

50 kg because the mass of the box remains unchanged

d.

Less than 50 kg because the weight of the column of air on the box will be absent

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