Question # 1

What are the SI base units of the coefficient of viscosity

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Kg m s^-2

kgm² s^-2

Kg m s^-1

kg m^-1s^-1

When each particle of the fluid moves along a smoth path, this path is known as

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straight path

smooth path

haphazard path

steamline

The direction of lines of force depends upon the direction of

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voltage

current

charges

none of these

The work done on the system by the environment is considered as

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positive

negative

zero

any one of them

If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:

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Becomes Half

Becomes double

Is not affected

Becomes one fourth

None of these

The instantaneous velocity of a body moving along a circle is directed

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along the radius

along the tangent

away from the circle

none of them

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 phase at the positive peak is

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Π/2

Π

3Π/2

2Π

the current is pass through the straight wire. The magnetic field established around it has its lines of force:

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Circular and endless

Oval in shape and endless

Straight

Parabolic

All are true

The product of force and time is called change in:

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Momentum

Impulse

Force

Both a and b

Area under the force displacement graph gives

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Power

Work

Heat

Energy

Identify the incorrect statement

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The distance between the objective and eye-piece is 16.02 cm

The angular magnification of the planet is 800

The image of the planet is inverted

The objective is larger than the eye-piece

A point charge Q is placed at the mid-point of a line joining two charges,4q and q. if the net force on charge q is zero,then Q must be equal to

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-q

+q

-2q

+4q

When V₁ is approximately zero then Bernoulli's equation reduces to

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Torricelli's theorem

Venturi relation

Equation of continuity

None of these

The crystalline structure of NaCl is

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rectangular

hexagonal

tetrahedral

cubical

Which of the following is an optical fibre in which the density of central core decreases towards its periphery?

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multi-mode step index fibre

multi-mode graded index fibre

both of them

none of them

Two circular rings have their masses in the ratio 1 : 2 and diameter in ratio 2 : 1 the ratio of their moment of inertia is

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1:4

4:1

2:1

√2:1

For a given angle of projection if the time of flight of a projectile is doubled the horizontal range will increases to:

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Four times

Thrice

Once

Twice

Which branch of physics deal with the structure and properties of solids

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Atomic Physics

Plasma Physics

Molecular Physics

Solid state Physics

Fluid friction of a spherical body depend on the

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Shape

Size

Orientation

All of these

The resultant of two forces.one double the other in magnitude,is perpendicular to the smaller of the two forces.The angle between the two forces is

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120°

60°

90°

150°

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