Question # 1

Where should be the centre of gravity of a body.

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It must be within the body

It must be outside the body

It may be near but not essentially within the body

It changes its position after sometime

Which quantity provides a quantitative measure of disorder.

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Entropy

Enthalpy

Randomness

Chaos

What will be the sound speed if the frequency is doubled.

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zero

Half

Double

Unchanged

A person of height 1.5 m stands 2.0 m in front of a plane mirror How far from the person is her image .

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2.0 m

3.0 m

3.5 m

4.0 m

If a single convex lens is placed closed to the eye then it can be used as

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Telescope

Simple microscope

Compound microscope

Opera glass

Binding energy per nucleon is.

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Greatest for heavy nuclei

Least for heavy nuclei

Greatest for light nuclei

Greatest for medium weight nuclei

The magnitude of the resultant of two equal forces is equal to either to the force What is the angle between the two forces

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0 ^o

120 ^o

60 ^o

180 ^o

The amount of heat needed per unit mass to raise the temperature of a system one degree at constant pressure is numerically aqual to

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The specific heat

The specific thermal energy

The specific heat at constant pressure

the internal energy of the gas

The force of friction that comes into action after the motion has started

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Static friction

Dynamic friction

Friction only

Limiting friction

Which experiment confirmed the de Broglie hypothesis.

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Double slit experiment

Division germier experiment

Schrodinger's Cat experment

Bohr's experiment

Efficiency of a Carnot engine depends on

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Temperature

Pressure

Volume

The nature of working substance

The door of an operating refrigerator in a closed room is opened after sometime the temperature of the room will be

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Lowered

Raised

Unaffected

Become zero

Which statement about convection is correct.

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Brownian motion is a form of convection

Convection occurs only in gas

Convection results from a density change

Evaporation is a form of convection

When transistor works as an amplifier, its output is.

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More

Less

Zero

Directly proportional to the input

The phenomenon of interference comes about because waves obey

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the impulse momentum theorem

An inverse square law of intensity

The principle of reciprocity

The principle of super position

What happens to the intensity or the brightness of the lamps connected in series as more and more lamps are added.

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Increases

Decreases

Remains the same

Cannot be predicted

The final image produced by a microscope is.

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Real and erect

Virtual and erect

Real and inverted

Virtual and inverted

What is the emission of light by a substance that has observed light or others electromagnetic radiations of a difference wavelength.

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Fluorescence

Illuminance

Luminance

Incandescence

A terrestrial telescope produces

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An react and real image

An inverted and real image

An inverted and virtual image

An erect and virtual image

Reversible alternation of the form of dimensions of a solid body under stress and strain is called.

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elastic limit

Plastic limit

elestic deformation

Plastic deformation

The work done in moving a body from one place to another in a gravitational field is independent of the

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applied force

Force of gravity

Path followed by the body

Force of earth

The dimensions of universal gravitational constant G are.

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[MLT-2]

[ML -2T-2]

[M-1L2T-2]

[ML-1T-1]

An electric lamp use energy at the rate of 46 W on a 12 V supply. How much charge passes through the lamp in 2s.

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0.15 C

0.50 C

2.0 C

8.0 C

The band of colours is called.

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Spectrum

Prism

Medley

LASER

Radio carbon in the atmosphere is produced by the bombardment of.

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Oxygen by high energy neutrons

Oxygen by high energy protons

Nitrogen by high energy protons

Nitrogen by high energy neutrons

The ration Cv/Cp = y for a diatomic gas like air is

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1.29

1.30

1.40

1.67

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

The centre of gravity of an object is also called.

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Centre of buoyancy

Centre of mass

Centre of the body

Torque

The velocity at which laminar flow changes to turbulent flow is called.

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Terminal velocity

Escape velocity

Critical velocity

Uniform velocity

According to Huygen's principle

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Light bends round corners

Light travels in a straight line

All points on primary wave front are considered centre of distances

Light has wave nature

Air bubble in water shines because of

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Reflection

Refraction

Diffraction

Total internal reflection

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