Question # 1

Structure of the nucleus was explained by

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J.J Thomson

Bohr

Millikan

Rutherford

A water hose with an internal diameter of 20 mm at the outlet discharges 30 kg of water in 60 s. What is water speed at the outlet if density of water is 1000 kg/m³during its steady flow

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1.3 m/s

1.6 m/s

1.9 m/s

2.2 m/s

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, which makes and angle of 60° with the horizontal. The work done by the boy is:

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1.25 J

12.5 J

125 J

None of these

To sources are said to be coherent if they have:

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Same amplitude

Same wavelength

Definite phase relation with each other

None of them

1 gm-cm^-3is equal to:

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10³kg-m^-3

10^-3kg-m^-3

1 kg-m^-3

10⁶kg-m^-1

While deriving equation of pressure by kinetic theory of gases, we take into account:

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Only linear motion of molecules

Only rotational motion

Only vibratory motion

All of these

Vibratory motion is always under

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Applied force

Restoring force

Periodic force

Gravitational force

For measuring the angle between two vectors graphically, we join:

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Tails of both the vectors

Tail of one vector with the head of other

Heads of both the vectors

None of these

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

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50

100

150

200

250

For the normal operation of the transistor, its

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emitter-base and collector base junctions are forward biased

emitter-base junction is reversed biased and collector base junction is forward biased

emitter-base junction is forward biased and collector-base junction is reverse biased

any one of these

If the stress increased beyond the elastic limit of the material. the deformation produced in the material will be

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permanent

temporary

either of them

none of them

At what distance should a book be placed from a 50 Cd bulb so that the luminance on the book becomes 2 Im m^-2

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50 m

10 m

5 m

1 m

The conductivity of super conductor at critical temperature becomes

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Zero

1

Infinite

Negative

A Perpetual motion is that motion which is

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Temporary

Continuous

Forever

None of these

The minimum distance between an object and its image in a convex lens is

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2 f

2.5 f

3 f

3.5 f

Which does not show polarization

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Longitudinal wave in gas

Transverse wave in gas

Both a and b

None of these

Angle subtended at the centre of the circle by a body is called

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Angular velocity

Linear velocity

Angular displacement

All of these

One second = ______.

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31 x 10^-8years

3.1 x 10⁸years

3.1 x 10^-8years

3.1 x 10^-18years

When the pressure of a fixed mass of a gas is decreased under isothermal condition there is

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Fall of temperature

Increase of density

No change in internal energy

A decrease in the value of PV

An are equal to half of the radius subtend angle of ________ at the center of circle.

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.π rad

2π rad

1/2π rad

1/2 rad

The study of nature has been classified into branches are:

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Two

Three

Four

None of these

Polymers have naturally combinations like with

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Oxygen

Sulphuric

Hydrocarbons

Oxygen and carbons

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