Question # 1

Which is the heat transfer mode between an object and its environment due to circular fluid motion.

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Conduction

Convection

Radiation

Mass transfer

A wave that remains in a constant position is called.

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Standing wave

Transvers wave

Shock wave

Longitudinal wave

If T1 and T2 are source and sink temperature respectively Carnot efficiency is.

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T1+T2/T1

T1-T2/T1

T1+T2/T2

T1-T2/T2

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

The value of critical angle of glass is

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45^o

42^o

48^o

52^o

who gave the law of equipartition.

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Maxwell

Carnot

Claussius

Boltzmann

If the gas pressure is increased then its mean free path becomes.

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More

Zero

Infinite

Less

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

A given quantity of an ideal gas is at pressure P and temperature T What is the isothermal bulk modulus of the gas.

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2/3 P

P

2P

3/2 P

The exitance of more than one distinct state with the same energy is called.

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Exigency

Degeneracy

Normally

Emergency

Which term given below refers to the concept moving clocks run slower than clocks at rest w.r.t an observer.

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Simultaneously

Mass variation

time dilation

Length contraction

Which of the following is not an application of diodes.

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A filters

Bridge rectifier

Half wave rectifier

Full wave rectifier

The value of magnetic field strength for parament magnets is.

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Unity

Infinity

Zero

Two

the gain of an amplifier is independent of

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The two externally connected resistances

What is happening inside the amplifier

Internal structure of the amplifier

All of the above

Two forces act together on an object the magnitude of their resultant force is minimum when they act at

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0 ^o

45^oC

90^o

180 ^o

Which term is used for the persistence of sound in a hall.

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Resonance

Acoustics

Symphony

Reverberation

Which statement about the image formed by a convex lens is correct.

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It is always real and eruct

It is always real and inverted

It is always virtual and erect

It may be either virtual or real

When a point charge which is responsible for a force being exerted on another point charge is suddenly moved the second charge experience.

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Nor charge of force

An instantaneous change of force

A sudden change of force of some later time

an increase of its charge because of induction.

At which temperature a ferromagnetic material becomes paramagnetic on healing.

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Kelvin temperature

Celsius temperature

Curie temperature

Fahrenheit temperature

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

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f

2f

f/2

zero

Which particles have spin quantum number 1/2

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Mesons

Laptons

Hadrons

Muons

The interference between two sounds of slightly differed frequency is

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shock wave

Beats

Sonic boom

Doppler's effect

The photons emitted in inner shell transition are.

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Alpha particle

Beta particle

Gama particle

Characteristic X-rays

If D1 and D2 are the powers of two lenses placed in contact then the power of the combination will be.

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D1+D2

D1-D2

D1/D2

D1 x D2

The constant lamda is called the.

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Decay constant

Gas constant

Planck's constant

Dose constant

The change in entropy for any reversible cycle is identically

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Infinite

Positive

Negative

Zero

Who proposed the temperature equalization mechanism of a body by thermal radiations with that of its surroundings.

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Pierre Provost

Robert Brown

Albert Einstein

Issac Newton

Some concept of static electricity were introduced by.

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Chinese

Plato

Thales

Archimedes

The particles equal in mass or greater than protons are called.

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Mesons

Bosons

Baryons

Nucleons

The SI unit of torque is

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kg ms-2

kg m2s-2

kg ms-1

kg m2 s-3

Which of the following describes that the time interval between two events may be different in different of references

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Simullaneously

Time dilation

Length contraction

Mass variation

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