Question # 1

If velocity is doubled then

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Momentum increase 4 time and K.E. increase 2 times

Momentum increases 2 times and K.E. remains constant

Momentum increases 2 times and K.E. increases 4 times

Both momentum and K.E. remain constant

In compound microscope, image formed by the eyepiece is

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Real

Invented

Erect

Diminished

An important application of the semi conductor is the

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Vacuum tube

Fluroescent tube

Copper oxide rectifier

Battery

Positive electric charge is the type of charge found on a rod which has been rubbed with silk and which is made of.

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rubber

Glass

Steel

Cork

One becquerel is equal to

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Decay of orie radioactive atoms per second

Decay of 10 radioactive atoms per secnd

Decay of 100 radioactive atoms per second

Decay of infinity radioactive atoms per second.

What is the SI unit for thermal conductivity.

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W m-1 K-1

W m-2 k-2

W m-3 k-1

J kg -1 k-1

For which of the following objects is the centre of mass equidistant from every point on its surface

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An unsharpened pencil

A gramophone record

An egg

A table tennis ball

Among different elements of the periodic table which of the following atoms is the simplest.

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Carbon

Oxygen

Hydrogen

Nitrogen

The inductance in a coil plays the same role as

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Inertia plays in machans

torque plays in machines

Energy plays in machines

Momentum plays in machines

Michelson used the equation to determine the speed of light.

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c = 4 fd

c = 8fd

c =12 fd

c = 18 fd

halls fall faster than rain drops due to their

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Grater size

Greater mass

Greater area

Structure

Angular momentum of a body under a central force is

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Zero

Maximum

Minimum

Constant

Which of the following has maximum viscosity.

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Oxygen

Mercury

Water

Glycerine

Current in an electrolyte is carried by.

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Electron only

Anions only

Citations only

Mesons only

A bi convex lens of a material of refractive index 1.5 has the radius of curvature of each side equal to 50 cm the power of the lens will be.

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0.5 dipotre

1.0 dioptre

1.5 diopter

2.0dioptre

Electricity is transmitted at high voltage rather than at low voltage because.

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It is generated at high voltage

It is safer

It requires less insulation

It wastes less energy

A disturbance that travels through space and time usually accompanied by energy transfer is called.

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sound

Wave

Echo

Frequency

The angle of incidence that causes the refracted ray in the rarer medium to bend though 90^o is called.

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Critical angle

solid angle

Plane angle

Acute angle

The capacity of a spherical conductor is numerically equal to its.

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Surface area

Diameter

Radius

Volume

When an arrow is shot from a bow, it has K.E. which is given to it by

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The elongated tail

The stretched string of bow

The throw of archer

The sharp arrows head

The binary equivalent of 25 is

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111001

11001

1001

10101

A body of mass 2 kg is suspended in a elevator by means of a spring The balance reads its weight when the elevator moves up with an acceleration of 5 m s-2 as.

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9.8 N

29. 6 N

26.5 N

30.5 N

What would be the colour of sky through hour the day .If the earth has no atmosphere.

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Blue

Red

White

Black

The work done is moving a very small charge in an electric field from one point to another is

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Independent of the path

Equal to the potential difference between the two points.

Measured in V m-1

Measured in J c-1

Two lenses of focal length 'f' are combined the resultant focal length is

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f

2f

f/2

zero

A application of the phenomenon of polarization is in

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The scattering of light beams

Explaining the blue colour of sky

Identifying chemicals elements

Analysis of mechanical stress

Light of passing through a polaroid is

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Plane polarized

Unpolarized

Circularly polarized

Elliptically polarized

A resistance is a device which

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Acids the flow of current is a circuit

Converts electrical energy to heat

Is a type of charge pump

Is like a switch

The same notes being played on sitar and veena differ in.

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Pitch

Quality

Both quality and pitch

Neither quality nor pitch

The index of refraction for a substance is

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Constant

Constant for a given wavelwngth

Variable with the speed of light

Never constant

Which one of the following has maximum frequency.

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Visible light

Gama rays

Ultraviolet rays

Infrared rays

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