Question # 1

Balmer series lies in that region of electromagnetic wave spectrum which is called:

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Visible region

Invisible region

Infra-red region

ultraviolet region

None of these

The density of blood is nearly equal to that of

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mercury

sodium

water

honey

The unit of flux density is also given by

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Weber/m²or Wb . m^-2

Weber/mor Wb . m

Weber/mor Wb . m^-1

Weber or Wb

The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called

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magnetic flux

magnetic flux density

magnetic induction

magnetic field intensity

When a nucleus emits an alpha particles, its charge number decreases by

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3

2

6

5

High speed meteors rushing through air reduces to ashes because of:

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Force of gravity

High resistance of air

Drag force

None of these

The first shell near the neucles is

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L-shell

X-shell

N-shell

M-shell

The linear momentum of the body is defined as

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p=ma

p=1/2ma

p=mv

p=1/2mv

The density of water is 10³kg/m³. The water pressure on a submarine is 2.0 x 10⁷N/m². The depth of the submarine below the surface of the water, in maters, is approximately

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200 m

11000 m

2000 m

8000 m

Aerodynamics is a branch of:

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Hydrodynamics

Thermodynamics

Both of them

Statics

Fluid friction is _____ the friction between two solid surfaces:

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Greater than

Smaller than

Equal to

None of these

Which one of the following has only bulk modulus?

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Diamond

Glass

Tungsten

Water

The half-life of a radioactive element which has only 1//32 of its original mass left after a lapse of 60 days is:

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12days

10days

22days

36days

For keeping a body in circular motion,the force required is

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Centripetal

Centrifugal

Radial

Tangential

According to equation E = mc² Kg mass is actually the enrgy

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8 × 10¹⁵ J

9 × 10¹⁷ J

9 × 10¹⁶ J

8 × 10¹⁵ J

By convention, the torques are taken as negative if they are in the

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downward direction

leftward direction

clockwise direction

anticlockwise direction

The image formed after objective lens of an astronomical telescope is

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Inverted

Diminished

Real

All of these

The minimum velocity necessary to put a satellite into the orbit is called critical velocity of the value

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6.7 kms^-1

7.9 kms^-1

8.1 kms^-1

9.1 kms^-1

A diffraction grating contains 5000 lines per centimeter, its grating element will be

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1 x 10^-4nm

1 x 10^-14m

1 x 10^-14cm

1 x 10^-4cm

The flow is said to be streamline or laminar when very particle

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Moves in different direction

Moves along the same path as

Slowly moves in one direction

None of these

When a silicon crystal is doped with a pentavalent element, then the atom of the pentavalent element is known as

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acceptor

donor

either of them

none of them

When a body moves in a circle in the clockwise direction, the angular displacement Δθ is taken as

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Positive

Negative

Both ways

None of these

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