KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 211 - 215 of 253

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Question number: 211

» Work, Energy and Power » Power

MCQ▾

Question

A person P of mass 72 kg walks up a stair case in 36 sec. Another person Q of mass 54 Kg walks up the same staircase in 6 sec. The ratio of the power generated by P to that by Q is,

Choices

Choice (4) Response

a.

2

b.

Equation

c.

Equation

d.

Equation

Question number: 212

» Work, Energy and Power » Conservation of Mechanical Energy

MCQ▾

Question

A particle is executing linear simple harmonic motion of amplitude A. At what displacement is the energy half kinetic and half potential.

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 213

» Electrostatics » Electrostatic Potential Energy

MCQ▾

Question

27 identical water drops, carrying equal charge q and having the same potential V, merge together. The energy of the new drop is given as,

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 214

» Kinematics » Motion in a Straight Line

MCQ▾

Question

A uniform rod AB of length 2 m is sliding along two mutually perpendicular surface OA and OB as shown in figure. When rod subtends an angle 600 with OB, the end Q has a velocityEquation . The velocity of the end P at that time is –

A rod sliding along two mutually perpendicular surfaces

A Rod Sliding Along Two Mutually Perpendicular Surfaces

In figure a rod sliding along two mutually perpendicular surfaces is shown.

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 215

» Ray Optics » Mirror Formula

MCQ▾

Question

In a concave mirror, an object is placed at a distance 27 cm from the focus and its image is formed at a distance 3 cm from the focus. The focal length of the mirror is,

Choices

Choice (4) Response

a.

9 cm

b.

4 cm

c.

5 cm

d.

3 cm

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