KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 197 - 201 of 268

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Question number: 197

» Gravitation » Escape Velocity

MCQ▾

Question

If the escape velocity from the earth is about Equation , then the escape velocity from a planet having twice the radius and the same mean density as the earth is –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 198

» Laws of Motion » Equilibrium of Concurrent Forces

Appeared in Year: 2013

MCQ▾

Question

A monkey is accelerating down a string whose breaking strength is one half of his weight. The minimum acceleration of the monkey should be,

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Zero

d.

g

Question number: 199

» Kinematics » Motion in a Straight Line

MCQ▾

Question

A rocket is fired upward from the earth’s surface such that it creates an acceleration of Equation . If after 6 s, its engine is switched off, the maximum height of the rocket from earth’s surface would be – (Assume gravitation field is uniform)

Choices

Choice (4) Response

a.

902 m

b.

486 m

c.

245 m

d.

850 m

Question number: 200

» Dual Nature of Matter and Radiation » Photoelectric Effect

MCQ▾

Question

The wavelength of the first line of Balmer series is 6134 Å. The wavelength of the first line of Lyman series is –

Choices

Choice (4) Response

a.

3008 Å

b.

3607 Å

c.

2678 Å

d.

3408 Å

Question number: 201

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

Question

A bob of mass 0.5 kg hangs from the massless string of a long simple pendulum. A bullet of mass 0.05 kg is fired vertically from below into the bob. The bullet gets embedded into the bob and the combination rises vertically through a height of 3.2 m. If g = 10 m s-2, then the velocity of the bullet is,

Choices

Choice (4) Response

a.

88 m s-1

b.

880 m s-1

c.

8800 m s-1

d.

8 m s-1

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