Question # 1

Wave nature of particle was proposed by

Choose an answer

Einstein

Plank

De-Brogile

Max well

Max plank received the Nobel Prize in physics for his discovery of energy quanta in

Choose an answer

1900

1906

1912

1918

When platinum wire is heated, it appears cherry red at

Choose an answer

1600°C

900°C

1100°C

1300°C

A photon is considered to have

Choose an answer

Momentum

Energy

Wavelength

All of the above

Absolute motion cannot be detected

Choose an answer

in its own frame of references

in a different frame of references

both in its frame and different frame of references

none of these

When a high energy photon interact with a metal, which of the following effect is most likely to be taken place

Choose an answer

pair production

photoelectric effect

Compton effect

None of these

Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in

Choose an answer

1916

1919

1921

1923

Wien's constant is measured in:

Choose an answer

Metre per kelviin

Metre kelvin

Kelvin per meter

Joules

Dynes

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

Choose an answer

500°C

900°C

1100°C

1300°C

According to the Max plank, energy is redialed or absorbed in

Choose an answer

discrete packets

continuous waves

either of them

none of these

Photoelectric effect takes place with a photon of:

Choose an answer

Very high energy

Very low energy

Low energy

High energy

None of these

When a position comes close to an electron they annihilate into photons such that

Choose an answer

each photon has energy 0.51 Me v

each photon has energy 1.02 Me v

each photon has energy 0.25 Me v

none of these

Which one of the following physical quantities changes with relativistic speed

Choose an answer

Length

Mass

Time

All of the above

The Stephen-Boltzmann law for the black body radiation is given by

Choose an answer

E = T²

E = -T²

E = T⁴

E = -T⁴

Position and momentum of a particle cannot both be measured simultaneously with perfect accuracy. This is the statement of

Choose an answer

photoelectric effect

pair production

Compton effect

uncertainty principle

A particle having mass and charge equal to that of an electron is called:

Choose an answer

Proton

Positron

Pion

Pi-meson

Both (C) and (D)

More Classes

Other Links

Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics Physics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer