AIIMS Physics: Questions 309 - 313 of 500

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Question number: 309

» Work, Energy and Power » Kinetic Energy

MCQ▾

Question

Find the mean translation kinetic energy of an oxygen molecule at 270 C. (Given: Avogadro number N=6.03×1023permole and R=8.3JK1mol1 ).

Choices

Choice (4) Response

a.

4.56×1021J

b.

4.56×1021J

c.

6.19×1021J

d.

5.20×1021J

Question number: 310

» Kinematics » Motion in a Straight Line

MCQ▾

Question

The displacement of a particle is given by y=3+4t+5t26t4 . The initial velocity and acceleration are respectively,

Choices

Choice (4) Response

a.

4,24

b.

10,48

c.

4,10

d.

10,24

Question number: 311

» Kinematics » Projectile Motion

MCQ▾

Question

A body is projected at such an angle that the horizontal range is half of the greatest height. The angle of projection is

Choices

Choice (4) Response

a.

38°

b.

53°

c.

83°

d.

92°

Question number: 312

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

MCQ▾

Question

The primary winding of a transformer has 750 turns whereas its secondary has 8250 turns. The primary is connected to a supply of 50 V, 50 Hz. The secondary will have an output of –

Choices

Choice (4) Response

a.

11 V, 50 Hz

b.

5 V, 5 Hz

c.

550 V, 50 Hz

d.

550 V, 500 Hz

Question number: 313

» Electronic Devices » Junction Transistor

MCQ▾

Question

Consider an N – P – N transistor amplifier in common-emitter configuration. The current gain of the transistor is 80. If the collector current changes by 4 mA, what will be the change in emitter current –

Choices

Choice (4) Response

a.

1.04mA

b.

20 mA

c.

4.05 mA

d.

1.5 mA

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