Question # 1

Machine parts are jammed due to:

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Increasing in viscosity of lubricant

Decreasing in viscosity of lubricant

Decreasing in surface tension of lubricant

None of these

In the region surrounding a current carrying wire:

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A magnetic field is setup

The lines of force are elliptical

Direction of lines of forces depends upon direction of current

Both (A) and (C)

All of these

Synthetic materials fall into the category of

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crystalline solids

amorphous

polymeric solids

all of them

In the forward biases situation, the current flowing across the p-n junction is a few:

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amperes

Milli amperes

Micro amperes

Pico amperes

None of these

Inverter is the name given to:

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NOT gate

OR gate

NOR gate

AND gate

XOR gate

Three quarks make:

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An electron

A meson

A baryon

A photon

None of these

Equal charges are given to two spheres of different radii. The potential will

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Be more on the smaller sphere

Be more on the bigger sphere

Be equal on both the sphere

Depend on the nature of the material of the sphere

Astrophysics is a branch of physics, which deals with:

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Sub-atomic particles

Stars and galaxies

Light and sound

Music

In case of mechanical waves, we study the motion of

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a single particle

collection of particle

any one of them

none of them

Work done along a closed path in a gravitational field is:

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Maximum

Minimum

Zero

Unity

Which of the following is a characteristic of an ideal fluid?

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it is non-viscous

it is incompressible

it's motion is steady

all of the above

Range of a projectile is R.when the angle of projection is 30°.Then the value of the other angle of projection for the same range is:

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45°

60°

50°

40°

Time of flight of projectile is

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Vi sinθ /g

2Vi Sinθ /g

2Vi sinθ/g

None

The speed of flow of fluid in laminar flow is

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Low

High

Very high

Some time high some time low

The angle between A and B is θ.The value of the triple product A,(B x A) is:

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A²B

Zero

A²B sin θ

A²B Cos θ

When a stress changes length, it is called the

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compressional stress

tensile stress

shear stress

any one of them

When there are number of forces acting on a body and the body is

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At rest

Motion

Rest or moving with uniform velocity

None of these

In young's slit experiment on interference the ratio of the intensities of a bright band and a dark band is 6 : 1 the ratio of the amplitudes o the interfering waves is

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16

5/3

4

1/4

For assessment if total uncertainly in case of division

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Absolute uncertainly are added

Absolute uncertainty are subtracted

Percentage uncertainties are added

Percentage uncertainties are substracted

The higher the satellite, the slower will the required speed and will complete one revolution in time

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Smaller

Very very longer

Longer

None of these

The absence of light in the optical fibres represents the number

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0

1

2

-1

Bernoulli's equation related to pressure, fluid speed and height which is

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An important equation

Principal equation

Fundamental equation

None of these

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