Question # 1

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

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2 : 1

4 : 1

1 : 4

3 : 4

The induced current in a conductor depends upon:

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Resistance of the loop

Speed with which the conductor moves

Any of these

Both A and B

None of these

Blood is an

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Compressible fluid

incompressible fluid

hard

none of them

Gaussian surface is always:

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Rectangular

Spherical

Cylindrical

Box shape

Any of these

A rotating body tends to be slower, when its angular acceleration is:

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Positive

Negative

Zero

Infinity

Angular frequency 'w' is basically a characteristics of

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linear motion

circular motion

both of them

none of them

The He-Ne laser discharge tube is filled with:

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85% He

15% He

50% He

60% He

85% Ne

Pressure may be define as _______ per second per unit area:

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Change in force

Change in momentum

Change in energy

Work done

Which of the following is most suitable as the core of transformer

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Soft iron

Alinco

Steel

None of these

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

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Gamma rays, micro waves, visible light

Radio waves, ultraviolet waves, X-rays

Ultraviolet rays, infrared rays, micro waves

Visible light, gamma rays, radio waves

If a gymnast is sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will:

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Increase

Decrease

Remains constant

None of these

Such substance which break soon after crossing the elastic limit is called

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Weak substance

Ductile substance

Brittle substance

Organic substance

The relative permitivity ∈_r for transformer oil is

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2.9

3.0

2.1

2.4

First law of thermodynamic is generalization

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Law of conservation of mass

Law of conservation of energy

Law of heat exchange

None of these

Prefix pico stands for

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10^-9

10^-6

10^-15

10^-12

If a person with a spring balance and a body hanging from it goes up and up in an airplane then the reading of the weight of the body as indicated by the spring balance will

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Go on increasing

Go on decreasing

First increase and then decrease

Remains the same

An object thrown in arbitrary direction in space with an initial velocity and moving freely under gravity will follow

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a circular path

a straight line

a hyperbola

a parabola

Diffraction is concerned with the superposition of

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very large number of secondary wavelets

a few secondary wavelets

two secondary wavelets

no secondary

Two bodies with kinetic energies in the ratio 4 : 1 are moving with equal linear momentum.The ratio of their masses is

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1 : 2

1 : 1

4 : 1

1 : 4

In the formula for velocity of efflux v = √2gh, h is the

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Height of liquid column from bottom of vessel

Height of orifice from the bottom of the vessel

Height of liquid column above the orifice

Height of the vessel

A spherical wavefront is that which has

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A source

A point source

An extended source

None of these

A satellite communication system can be set up the geo-stationary orbits are

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2

3

5

1

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