KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics: Questions 238 - 241 of 250

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Question number: 238

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

A hanging wire is 170 cm long having a bob of 1.50 kg. It shows a time period of 1.35 s on a Planet Newtonia. If the circumference of Newtonia is 5.16×107m , find the mass of the planet.

Choices

Choice (4) Response

a.

3.72×1025kg

b.

3.15×1025kg

c.

9.25×1024kg

d.

3.22×1024kg

Question number: 239

» Properties of Solids & Liquids » Surface Energy and Surface Tension

MCQ▾

Question

A hollow sphere has a small hole in it. On lowering the sphere in a tank of water, it is observed that water enters into the hollow sphere at a depth of 60 cm below the surface. Surface tension of water is 7×102Nm1 . The diameter of the hole is,

Choices

Choice (4) Response

a.

121mm

b.

128mm

c.

114mm

d.

142mm

Question number: 240

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

Question

A 30 g bullet passes through a plate of mass 1 kg and finally comes to rest inside another plate of mass 2970 g. It makes the plates move from rest to same velocity. The percentage loss in velocity of bullet between the plates is –

Choices

Choice (4) Response

a.

50%

b.

0

c.

75%

d.

25%

Question number: 241

» Rotational Motion » Moment of Inertia

MCQ▾

Question

An equilateral triangle is formed by three identical uniform rods each of length L and mass M. The moment of inertia of the system about an axis passing through one corner is –

Choices

Choice (4) Response

a.

ML26

b.

2ML23

c.

3ML22

d.

ML22

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