Question # 1

The charge carries in the electrolyte are:

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Positive ions

Negative ions

Either (A) or (B)

Both (A) and (B)

Neither (A) nor (B)

Absolute temperature can be calculated by

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Means squares velocity

Motion of the molecule

Both A and B

None of these

The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

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Increase

Decrease

Remain F

Become 10F/9

For addition and subtraction purposes, absolute uncertainties are:

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Added

Subtracted

Multipiled

Divided

When the pn-junction is in reversed biased, current flows through the junction due to the

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majority carriers

minority carriers

either of them

none of them

A container has a small hole in the bottom. Air can go through this hole,but water cannot. This can be best explained by the statement that

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water contains hydrogen atoms, air does not

water molecules are smaller than molecules in the air

surface tension of the water prevents it from

The pressure will be low where the speed of the fluid is

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Zero

High

Low

Constant

The number if neutrons in the nucleus of ₉₂U²³⁵are

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Infinite

92

235

143

A body of weight 1 N has a kinetic energy of 1 joule when its speed is:

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1.46 m sec^-1

2.44 m sec^-1

3.42 m sec^-1

4.43 m sec^-1

The portion of the water above its mean level forms a:

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Crest

Trough

Both A and B

None of these

The irregular and unsteady flow of the fluid is called

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turbulent flow

steady flow

either of them

both of them

The unit cell of the shape of match box is called

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Cubic

Tetragonal

Orthorhombic

Rhomboheral

A church organ consist of open ended pipes ranging from 4m to 4 mm, if the speed ofsound is considered as 400 m/s then the min and max frequency is:

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400 Hz and 4 kHz

100 Hz and 100 kHz

50 Hz and 50kHz

400 Hz and 400 kHz

How many major components of fibre optic communication system are

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4

5

3

2

The motion in a plane is the motion in

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one dimensions

two dimensional

three dimensional

all of them

An alpha particle is accelerated through a potential difference of 10⁶ volt.Its kinetic energy will be.

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1 MeV

2 MeV

4 MeV

8 MeV

In a diffraction fringes pattern the fringes are

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Equally spaced

Wider near the centre and narrower away from it

Narrower near the centre and Wider away from it

None of these

When a stress changes its volume it is called

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Tensile stress

Shear stress

Volume stress

None of these

The function of compensator plate in interferometer is to

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Interfere properly

To equalize the distance of M₁ and M₂

Reflecting light properly

None of these

Polarization is a phenomenon in which

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Electric intensity decreases

Potential difference decreases

Charge 'Q' decreases

All of them

A rocket carries its own fuel in the form of

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liquid only

liquid or solid

liquid and solid

liquid or solid and oxygen

Fringe spacing in YDS experiment will be maximum if we use

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Red light

Green light

Violet light

Blue light

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