Question # 1

For Protium, the mass defect is:

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Infinite

Zero

Very large

A few grams

None of these

The minimum charge on any object can not be less than

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1.6 x 10^-19C

3.2 x 10^-19C

1.0 C

4.8 x 10^-19C

The results of spectra obtained by Blamer were expressed in 1896 by

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Bohr

Rydberg

Planck

Rutherford

Coulomb

Three quarks make:

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An electron

A meson

A baryon

A photon

None of these

Force is a:

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Scalar quantity

Base quantity

Derived quantity

None of these

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec^-2comes out to be

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980 N

580 N

1380 N

Zero

According to the second law, which is must to produce work

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a source contains a large amount of heat energy

two sources at the same temperature

two sources at the different temperatures

a source contains a small amount of energy

Thermocouple is an arrangement of two different metals

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To convert heat energy in to electrical energy

To produce more heat

To convert heat energy into chemical energy

To convert electric energy in to heat energy

Which quantity is important in stating the entropy of the system

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initial entropy

final entropy

change in entropy

none of them

The transition from solid to liquid is actually from:

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Order to disorder

Disorder to order

Order to order

Disorder to disorder

None of these

Michael Faraday is known by his work on

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Nuclear strong force

Gravitational force

Nuclear weak force

Electric force

None of these

In thrill machine rides at amusement parks, there can be an acceleration of

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2 g

3 g

More than 3 g

4 g

The mass of electrons in Me V is

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1.02 Mev/C²

0.51 Mev/C²

51 Mev/C²

102 Mev/C²

The speed of sound in air is

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320 ms^-1

323 ms^-1

330 ms^-1

333 ms^-1

Photo phone was invented by

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Edison

Graham Bell

Bardeen

None of these

The rightward forces acting on a body in equilibrium are taken as

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negative

positive

either negative or positive

none of them

The ability of body to return to its original shape is called

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Elasticity

Stress

Strain

Shear

An object is placed at a distance of f/2 from a convex lens.The Image will be

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At one of the foci,virtual and double its size

At,3/f real and inverted

At 2f,virtual and erect

At f,real and inverted

In case of destructive interference of two waves, the amplitude of the resultant wave will be ______ either of the waves

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Greater then

Smaller then

Equal to

None of these

The forbidden energy gap in semiconductors

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Lies just below the valence band

Lies just above the conduction band

Is the same as the valence band

Lies between the valence band and conduction band

Linear momentum is a

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fixed quantity

constant quantity

scalar quantity

vector quantity

If the mass and radius of a planet are doubled, then acceleration due to gravity on its surface will become

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One fourth

One half

Double

Four times

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