KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 204 - 207 of 253

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Question number: 204

» Experimental Skills » Transistor

MCQ▾

Question

The transfer ratio β of a transistor is 60. The input resistance of the transistor when used in the common-emitter configuration is 2 KΩ. The peak value of the collector a. c. current for an a. c. input voltage of 0.05 V peak is –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 205

» Work, Energy and Power » Work-Energy Theorem

MCQ▾

Question

The displacement x of a particle moving in one dimension, under the action of a constant force is related to time t by the equation:

Where, x is in meter and t is sec. The work done by the force in first 7 sec is –

Choices

Choice (4) Response

a.

4 J

b.

2 J

c.

6 J

d.

0 J

Question number: 206

» Gravitation » Energy

MCQ▾

Question

Two starts each of 1 solar mass are approaching each other for a head-on collision. When they are at a distance of 109 km, their speeds are negligible. The speed with which they collide is –

(The radius of each star is 104 km, assume the stars to remain undistorted until they collide. . )

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 207

» Electrostatics » Capacitors

MCQ▾

Question

50 sheets of mica, each of thickness 0.1 mm are interspersed with aluminum foils of area 40 cm2. The metal sheets are connected alternately to form a system of capacitors. The capacitance of the capacitor is –

Choices

Choice (4) Response

a.

b.

c.

d.

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