Question # 1

In a normal healthy person the value of diastolic pressure is

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75 - 80 torr

100 torr

120 torr

none of them

A photon is considered to have

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Momentum

Energy

Wavelength

All of the above

A ball is dropped from a height of 4.2 meters. To what height it will rise if there is no loss of KE after rebounding?

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4.2 m

8.4

12.6

None of these

Astrophysics is a branch of physics, which deals with:

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Sub-atomic particles

Stars and galaxies

Light and sound

Music

Graphs which are used to illustrate the variation of velocity of an object with time are called

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distance time graphs

speed time graphs

velocity time graphs

acceleration time graphs

If the ends of a wire are connected to a battery an electric field E will be set up at:

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The ends of the wire only

Mid points of the wire only

Every point within the wire

At nodes only

Both (B) and (D)

Where the streamlines are very far apart from each other, the pressure will be

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low

zero

high

all of them

Due to relative motion of observer and the frame of reference of events, time always:

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Dilates itself

Contracts itself

Stretches itself

Both (A) and (C)

None of these

In case of the three dimensional deformation, when volume is involved, the ratio of applied stress to volumetric strain is called

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Young's modulus

Bulk modulus

Shear modulus

all of them

Radioactivity was discovered by:

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Becquerel

Marie curie

Pierre curie

All of them

None of these

Inertia mass and gravitational mass are

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opposite

identical

identical when there is no friction

all of them

The effect is to increase the inflating the bag is

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To compress the blood vessels

To increase external pressure

To cut off the flow of blood

All of these

At any point on the right bisector of the line joining two equal and opposite charges

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At electric field is zero

The electric potential decreases with increasing distance from the centre

The electric potential is zero

The electric field is perpendicular to the line joining the charges

Relation between range and maximum range is

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R=R_max Sinθ

R=R_max Sinθ/2

R=R_max Sin2θ

R_max = RSin2θ

If the distance between two masses is doubled, the gravitational attraction between them

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Is doubled

Becomes four times

Is reduced to half

Is reduced to a quarter

The time taken by light for its passage from M to m and back is

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2c/d

d/2c

2d/c

d²/2c

A chiminey works best when it is

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Tall

Exposed to air currents

Not tall but wide

a and b

The bending of light when it passes from one medium to another is known as

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Refraction

Interference

Polarization

Diffraction

The centripetal acceleration is supplied by

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Applied force

Gravity

Initial velocity

None of these

Fahrenheit and centigrade (Celsius) thermometers have the same reading at

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-100°C

60°C

40°C

-40°C

The total flux through a closed surface does not depend on

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Geometry of closed surface

Medium

Charge used temperature

None of these

The wave length of x-rays is of the order of

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10^-17 m

10^-4 cm

10^-9 m

10^-10 m

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