Question # 1

Davision and Germer performed experiment to verify

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de-Brogile hypothesis

theory of relativity

Newton's law of gravitation

Mass-energy relation

Wave nature of particle was proposed by

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Einstein

Plank

De-Brogile

Max well

When a platinum wire is heated, it appears orange red at

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500°C

900°C

1100°C

1300°C

According to Einstein, with the great increase in the speed of the body, the relativistic mass of the body

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Remains constant

Decreases

Increases to infinity

Reduced to zero

Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in

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1890

1895

1900

1905

When a platinum wire is heated, it appears dull red at about

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500°C

900°C

1100°C

1300°C

The mass of an object will be doubled at speed

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1.6 x 10⁸ms^-1

2.6 X 10⁸ms^-1

2.6 x 10⁷ms^-1

2.6 x 10⁹ms^-1

An inertial frame is that frame in which

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a>0

a=0

a<0

none of these

The general theory of relativity treats problems involving

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inertial frame of references

accelerating frame of references

both of these

none of these

Practically the quantity v/c is always:

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less than one

Equal to one

Greater then one

all of these

None of these

When a platinum wire is heated, it appears yellow at

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1600°C

900°C

1100°C

1300°C

Compton derived an expression to find compton shift by applying to the process, the law of conservation of:

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Energy only

Momentum only

Mass only

Charge only

Both (A) and (B)

The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as

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classical mechanics

Newtonian mechanics

quantum mechanics

statistical mechanics

An electron is accelerated through a potential difference of 50v. its de-Brogile wavelength is

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1.66 x 10^-29m

1.74 x 10^-10cm

17.4 x 10^-6m

1.74 x 10^-10m

The energy of photon 'E' is proported to

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The magnetic field H

The electric field E

Both the electric and magnetic field H and E

Frequency

Photocell is a device which converts

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chemical energy into electrical energy

electrical energy into light energy

heat energy into electrical energy

light energy into electrical energy

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