KVPY Stream-SA (Class 11) Physics: Questions 214 - 217 of 252

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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 velocity 13ms . 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.

3

b.

13

c.

13

d.

3

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

Question number: 216

» Wave Optics » Interference

MCQ▾

Question

In a Young’s experiment, the interference pattern is found to have an intensity ratio between the bright and dark fringes as 36. The intensity ratio of the two interfering light waves is –

Choices

Choice (4) Response

a.

75

b.

4925

c.

259

d.

53

Question number: 217

» Laws of Motion » Equilibrium of Concurrent Forces

MCQ▾

Question

A soldier with a machine gun, falling from an airplane gets detached from his parachute. He is able to resist the downward acceleration if the shoots 60 bullets a second at the speed of 450 m/s. If the weight of a bullet is 53 gm, what is the weight of the man with the gun? Ignore resistance due to air and assume the acceleration due to gravity g = 9.8 ms–2

Choices

Choice (4) Response

a.

112 kg

b.

152 kg

c.

146 kg

d.

136 kg

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