Question # 1

The wave form of S.H.M will be

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square wave

sine wave

rectified wave

saw-tooth wave

The velocity of sound in air not effected by changes in

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Moisture contents in air

Temperature of air

The atmosphere pressure

The composition of air

The term Brownian movement refers to

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irregular motions of small particles suspended in a fluid

convection currents in a liquid or gas

convection currents in a gas but not in a liquid

the stretching of a body beyond its elastic limit

Blood is an

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Compressible fluid

incompressible fluid

hard

none of them

A digital system deals with quantities or variables which have

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only one state

only two discrete states

three discrete states

four discrete states

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

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KHz

MHz

GHz

BHz

A body is thrown from a height h with speed u, it hits the ground with speed V

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The value of V is maximum if the body is thrown vertically downward

The value of V is maximum if the body is thrown vertically upwards

The value of V is minimum if the body is thrown horizontally

The value of V does not depend on the direction of which it is thrown

To make an LED, it is impreacticable to use:

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Silicon

Gallium arsenide

Gallium arsenide phosphide

Iron

Both (B) and (C)

Charge to mass ratio (e/m) of an electron is given by the relation

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e/m = 2V/Br²

e/m = 2V/B²r

e/m = 2V/B²r²

e/m = V/2B²r²

The reciprocal of decay constant λ of a radioactive material is:

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Frequency

Half life

Year

Mean life

None of these

The phase at the positive peak of an A.C. cycle is:

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0º

90º

180º

0 andᏘ

Ꮨ/2 and 3Ꮨ/2

The time rate of change of velocity is called

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Initial velocity

Uniform velocity

Accelerations

None of these

A cold soft drink is kept on the balance.When the cap is opened then the weight

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Increases

Decreases

First increases then decreases

Remains same

Waves in ocean are produced due to

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Tidal movement

Winds

Both A and B

Sunlight

Semiconductor materials have the conductivities generally lies between

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10^-5 to 10^-6 (Ωm)^-1

10^-6 to 10^-4 (Ωm)^-1

10^-7 to 10^-3 (Ωm)^-1

None of these

A long them flat sheet has a uniform surface charge density σ. The magnitude of the electric field at a distance 'r' from it is given by

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σ/∈_o

σ/2∈_o

σ/∈_or

σ/2∈_or

The relation Cp > Cv by an amount equal to

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Gas constant

Universal gas constant

Both

None of these

The path (or trajectory) described by a projectile is

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a parabola

a hyperbola

a circle

a straight line

When an image is placed at the focal length of the eye piece, the final image formed at

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2 F

4 F

6 F

Infinity

A man is an elevator descending with acceleration will conclude his weight has

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Increase

Decrease

Remain constant

Become zero

Which of the following statement about centripetal and centrifugal force is correct

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They are oppositely directed

They cancel each other

Both are on the same body

None of these

The ‘emf ’ is always even when no current is drawn through the battery of the cell:

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Zero

Present

Absent

Maximum

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