KVPY Stream-SA (Class 11) Physics: Questions 8 - 10 of 252

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Question number: 8

» Ray Optics » Total Internal Reflection

Appeared in Year: 2011

MCQ▾

Question

Light enters an isosceles right triangular prism at normal incidence through face AB and undergoes total internal reflection at face BC as shown below.

 An isosceles right triangular prism

an Isosceles Right Triangular Prism

Figure shows light enters an isosceles right triangular prism at normal incidence through face AB and undergoes total internal reflection at face BC.

The minimum value of the refractive index of the prism is close to

Choices

Choice (4) Response

a.

1.55

b.

1.42

c.

1.10

d.

1.72

Question number: 9

» Gravitation » Gravitational Acceleration

Appeared in Year: 2010

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 40 bullets a second at the speed of 500 m/s. If the weight of a bullet is 49 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.

75 kg

b.

100 kg

c.

50 kg

d.

125 kg

Question number: 10

» Kinetic Theory of Gases » Kinetic Energy and Temperature

Appeared in Year: 2011

MCQ▾

Question

In a thermally isolated system, two boxes filled with an ideal gas are connected by a valve. When the valve is in closed position, states of the box 1 and 2, respectively, are (1 atm, V, T) and (0.5 atm, 4V, T). When the valve is opened, the final pressure of the system is approximately

Choices

Choice (4) Response

a.

0.75 atm

b.

0.6 atm

c.

0.5 atm

d.

1.0 atm

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