Question # 1

A pair of quark and antiquark makes a:

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Meson

Baryon

Proton

Neutron

None of these

The change of magnetic flux through a circuit will produce

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Magnetic Field

Electric Field

emf

a.c

Gaussian surface is always:

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Rectangular

Spherical

Cylinder

Box shape

Any of these

1 gm-cm^-3is equal to

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10³kg-m^-3

10^-3kg-m^-3

1kg-m^-3

10⁶kg-m^-1

Mass of neutron is

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1.67 x 10^-31kg

1.67 x 10^-27kg

9.1 x 10^-31kg

1.67 x 10^-19kg

Phenomenon of radioactivity is due to disintegration of

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nucleus

neutron

proton

molecule

The photocopying process is called:

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Geography

Sonography

Xerography

Zerography

None of these

According to Rutherford atomic model, the positive charge in an atom

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is concentrated at its centre

is in the form of positive electron at same distance from its centre

is spread uniformly through its volume

none of these

According to kinetic theory of gases, molecules of a gas behave like

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Inelastic spheres

Perfectly elastic rigid sphere

Perfectly elastic non-rigid spheres

Inelastic non-rigid spheres

Centripetal force for electron is given by

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mv²/ r

mv / r²

mv²/ r

mr²/ v

The disorder in the system increases due to the

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removal of heat

addition of heat

removal or addition of heat

none of them

A tube is tapered from 20 cm diameter to 2 cm diameter, the velocity at the first cross-section is 50 cm/s, then the velocity at the second cross-section is

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50 m/s

20 m/s

40 cm/s

5 cm/s

The graph showing the variation of displacement with time is a

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Sine curve

Straight line

Parabola

None of these

To convert galvanometer into ammeter we connect

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small resistance in parallel with galvanometer

small resistance in series with galvanometer

high resistance in series with galvanometer

high resistance in parallel with galvanometer

The strength of magnetic field at certain points around a wire depends upon:

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Value of current passing

Distance from the current element

Color of the material

Both (A) and (B)

Both (B) and (C)

An angle of 180° in circular motion is equivalent to ______ in SHM.

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Half the vibration

One vibration

3/4th of a vibration

None of these

Energy is stored in the choke coil in the form of

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Heat

Magnetic energy

Electric energy

Electro-magnetic energy

The work performed on an object does not depend on

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Force applied

Angle at which force is inclined to the displacement

Initial velocity of the object

Displacement

The Stephen-Boltzmann law for the black body radiation is given by

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E = T²

E = -T²

E = T⁴

E = -T⁴

The internal pressure of the blood is

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less than the external atmospheric pressure

greater than the external atmospheric pressure

equal to the external atmosphericpressure

none of them

When a horse pulls a cart, the force that makes the horse run forward is the force exerted by

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The horse on the ground

The horse on the cart

The ground on the horse

The ground on the cart

The projectile attains maximum horizontal range when it is projected at an angle of

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30°

45°

60°

75°

The ratio of shearing stress/shearing strain is called as

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Modulus

Pascal modulus

Hooker's modulus

Shear modulus

In SHM, there is always a constant ratio between displacement if body and its:

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Velocity

Period

Mass

Acceleration

With age, least distance of distinct vision:

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Increases

Decreases

Is not affected

None is correct

Direction of motion ______ in circular motion:

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Changes off and on

Changes continuously

Does not change

None of them

The Space around the Earth within which it exerts a force of attraction on other bodies is known as

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Nuclear field

Conservative field

Electric field

Gravitational field

An oscillating body oscillates due to:

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Applied force

Restoring force

Frictional force

None of these

Blood is an

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Compressible fluid

incompressible fluid

hard

none of them

Blomass includes:

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Crop residue

Natural vegetation

Animal dung

All of these

Electric intensity at a place due to a charged conductor is a

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Scalar quantity

Vector quantity

Semi vector and semi scalar

Dimensionless quantity

Both A and D are true

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