Question # 1

Artificial polymers are made by a chemicals reaction known as.

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Crystallization

Electroplating

Polymerization

Polarization

Which of the following should not change in isothermal operation.

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Heat constant

Volume

Pressure

Temperature

What is the about the electric field inside a metallic sphere.

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It is zero

It varies with the shape of the conductor

It depends on the charge there

It does not charge the metallic sphere

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

Two stem engine A and B have their sources at 900 K and 600 K and their sinks are at 450 K and 300 K respectively.

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They are equally efficient

A is less efficient than B

a is more efficient than B

Their efficiencies cannot be determined

Which of the following will not acceleation.

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The moon in its orbit

A tennis ball rebounding from ground

A store in free fall

A car in which the engine thrust is equal to the friction

The dimensions of torque are.

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[MLT-2]

[ML-1T-1]

[ML2T-2]

[ML-2]

An inflated tyre suddenly bursts As a result of this temperature of the surrounding

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Increases

Descreases

Remains constant

May increase or decrease

Which of the following gases has the maximum rms speed at STP.

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O2

H2

N2

CO2

The venturimeter is an instrument used for measuring the

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Viscosity of a liquid

Flow speed of a liquid

Compressibility of a fluid

Specific gravity of a liquid

The emission of electrons from a metal surface when exposed to light of suitable frequency is called.

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Pair production

Compton effect

Photo electric effect

Zeeman effect

At high altitudes, the blood flows out of nose and ear because.

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Blood pressure increase at high altitudes

Percentage of oxygen in the air increase

Atmospheric pressure decreases there

Density of blood decreases of high altitudes

Which of the following characteristics of a wave is independent of the others.

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speed

Frequency

Amplitude

Wavelength

To final image produced by a compound microscope is.

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Real and inverted

Real and erect

Virtual and erect

Virtual and inverted

Who studied the change in velocity with the help of geometry for the first time.

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Nicole Oresme

Galileo

Alberuni

Ibn al haithem

The total number nucleons in a nucleus are called.

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Mass number

Atomic number

Neutron number

Isotopes

In which given process does the system always return to the original thermodynamic state.

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Cyclic

Adiabatic

isothermal

Isobaric

The focal length of a thin converging lens is 10 cm What is the maximum distance from the lens that the object can be placed so that the lens acts as a magnifying glass.

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5 cm

10 cm

15 cm

20 cm

The process of combining low frequency signals with high frequency radio waves is called.

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Modulation

Resonance

Fluctuation

Amplitude

The working of cloud chamber is based in the presence of.

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Super heated vapours

Liquid

Super saturated vapors

Unsaturated vapours

The process of pair production will take place if the energy of photon is greater than.

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0.21 MeV

0.51 MeV

1.51 MeV

1.21 MeV

Birds planes and boats are streamlined to reduce

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Turbulence

Thrust

Drag

Lift

Lenses of what diameter are usually not practical.

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Less than 1 m

Larger than 1m

Larger than 5 m

Larger than 10 m

Which of the following is standard scale of temperature

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Mercury scale

Platinum resistance scale

Gas scale

Alcohol scale

A body is thrown vertically upward with initial velocity 9.8 ms-1 it will reach the height.

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4.9 m

19.9 m

29.4 m

49.2 m

If two different masses have same momentum then the lighter one has more.

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K.E. and velocity

Velocity only

Both K.E. and P.E.

Only P.E

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 resistance of a capacitor when it is connected with a battery is.

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Zero

Finite

Infinite

The same

The first super conductor was discovered by

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Faraday

Lenz

Kamaerlingh Ornes

Oersted

The locus of all points in the same state of vibrations are known as.

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half period zone

A wavefront

A half wave zone

A full wave zone

The most familiar example of radioactive dating is.

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Nitrogen dating

Carbon dating

Hydrogen dating

Helium dating

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