Question # 1

INTELSAT operates at frequencies 4, 6, 11, 14 having unit of:

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KHz

MHz

GHz

BHz

Addition of 2.189 kg, 11.8 kg and 5.32 kg gives the rounded off answer as:

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19.398

19.400

19.4

19.3

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

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Nitrogen

Hydrogen

Lead

Oxygen

Krypton

The displacement coincides with the path of the motion when a body moves is a

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curved line

straight line

may be curved or straight

none of them

Examples of physical quantities are:

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Length

Color

Effect of music

All of these

.Depletion region contains:

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Protons

Positive ions

Negative ions

Both (B) and (C)

Both (A) and (C)

In a resonance situation the amplitude of the motion may become extra ordinarily large, if

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the driving force is large

the driving force is zero

the driving force may be feeble

all of them

The efficiency of diesel engine is

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25%

25 - 30%

35%

35 - 40%

Substances which break just after the elastic limit is reached, are known as

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brittle substances

ductile substances

plastic substances

elastic substances

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

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Equal to

Greater than

Smaller than

None of these

The existence of position was predicted by Dirace in

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1920

1925

1930

1928

Two sources of waves are called coherent if

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Both have the same amplitude of vibrations

Both produce waves of the same wavelength

Both produce waves of the same wavelength having a constant phase difference

Both produce waves having the same velocity

When the temperature difference between the source and the the sink increases, the efficiency of the heat engine will

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Increase

Decrease

Is not affected

May increase or decrease depending upon the nature of the working substance

The direction of the acceleration is the same as that of

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Displacement

Velocity

Both

None of these

Fight of rocket in the space is an example of

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Newton's first law

Newton's third law

Newton's second law

all of them

If a lens is cut into two piece perpendicular to the principal axis and only part is used the intensity of the image:

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Remains same

1/2 times

2 times

Infinite

What are the rations among the volumes of gases of ³²O₂,²H₂ and ¹⁶CH₄, If they taken in equal masses?

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2 : 16 : 1

2 : 16 : 2

1 : 1 : 1

1 : 16 : 2

Bulk modulus for bass is

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20

41

61

81

In projectile motion the vertical acceleration is

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Zero

Maximum

'g'

None of these

The limit up to which the stress is directly proportional to strain is called

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Elastic limit

Proportional limit

Breaking limit

Ultimate tensile limit

There is a regular arrangement of molecules in

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amorphous solids

polymeric solids

crystalline solids

none of these

The ultimate tensile strength (UTS) can be regarded as the

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Maximum strength of the material

Nominal strength of the material

Minimum strength of the material

None of these

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