Question # 1

Under normal circumstances, the volume of blood is sufficient to keep the vessels

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flatted for all times

inflated for all times

inflated for small times

none of them

Which quantity has different dimension?

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Tension

Work

Energy

Torque

A black body is

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an ideal absorber

an ideal radiator

both of them

none of them

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

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2

1

0.5

1.5

Physics deals with the study of

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Matter

Energy

Both of them

Human Body

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

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8 J

16 J

4 x 10^-3J

2 x 10^-3J

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

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1 MeV

2 MeV

4 MeV

8 MeV

A train is moving with a velocity of 25 m/s and a car is moving behind it by a velocity of 8 m/s in same direction. The relative velocity of train with respect to car is

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17 m/s

33 m/s

17.5 m/s

none

The effect of friction between different layers of a flowing fluid is described in terms of

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motion of fluid

nature of fluid

colour of fluid

viscosity of fluid

The electric flux is linked with a surface will be maximum when

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The surface is held parallel to the electric field

The surface is held perpendicular to the electric field

The surface makes an angle of 45° with the electric field

All of the above

A non-inertial frame of reference is that frame of reference in which

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a = 0

a > 0 or a < 0

v = 0

none of them

When the velocity of the car is constant. The velocity time graph is a

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Straight line

Straight line rises the same height for equal intervals of tome

Horizontal straight line

None of these

Who confirm the wave theory of light ?

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Newton

Michelson

Newton

Thomos Young

A pure semiconductor has:

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An infinite resistance at 0^oC)

A finite resistance which does not depend upon temperature

A finite resistance which decreases with temperature

A finite resistance which increase with temperature

Basic part or parts of a heat engine

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Source

Sink

Working substance

All of these

In compound microscope magnification of objective is 2 and magnification of eyepiece is 4 magnification of compound microscope is

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2

6

8

None

When a person jumps off the ground is

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greater than the weight of the person

smaller than the weight of the person

equal to the weight of the person

zero

Random error occurs when repeated measurements of the quantity under the same conditions gives

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Equal values

Different values

Increasing values

None of these

In metallic crystals which of the following thing remains constant?

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amplitude of oscillations

temperature of solid

average atomic positions

all of them

Heat is a form of

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Power

Work

Energy

Motion

The efficiency of full wave rectifier is:

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25.6%

81.2%

81.6%

71.2%

The direction of force experienced by a moving in a magnetic field will be:

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Parallel to the field

Opposite to the field

Parallel to its direction of motion

Perpendicular to both the field and the velocity vector

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