Question # 1

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Choose an answer

Equal to 1

Less than 1

Greater than 1

Infinity

Neutrons are

Choose an answer

positive charge

negatively charged

massless

neutral

The nuclei of an element having the same charge number but different mass numbers are called:

Choose an answer

Isobars

Isotopes

Isomers

Isobaric

Isothermal

Beta particles are

Choose an answer

hydrogen nuclei

helium nuclei

electrons

photons

The distance travelled byα-particle in a medium before coming to rest, is called

Choose an answer

range ofγ-particle

range of neutrons

range of particle

none of these

The penetration power ofβ-particle is

Choose an answer

zero

less thanα-particle

equal toα-particle

greater thanα-particle

1 amu is equal to.

Choose an answer

1.66 x 10^-24kg

1.66 x 10^-19kg

1.66 x 10^-24kg

1.66 x 10^-27kg

Alfa particles are

Choose an answer

hydrogen nuclei

helium nuclei

electrons

photons

In wilson cloud chamber, the air becomes saturated with:

Choose an answer

Alcohol vapours

Water

Helium gas

Nitrogen gas

None of these

The range of particle depends upon the factor

Choose an answer

charge, mass and energy of particle

density of medium

ionization potential of the atoms

all the above

The unit of decay constant is:

Choose an answer

Second

Metre

Hour

Year

Second^-1

Nucleus consists of

Choose an answer

proton and neutron

protons and electron

electron and neutron

protons only

When certain nucleus emits aβ-particles, is mass number:

Choose an answer

Remain same

Increases by one

Decreases by one

Decreases by four

None of these

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Choose an answer

A - Z

A + Z

Z

A

Fraction of the decaying atoms per unit time is called

Choose an answer

decay atom

decay element

decay constant

decay

The isotope/s of hydrogen is /are:

Choose an answer

Protium

Deuterium

Tritium

Both (A) and (B)

All of these

More Classes

Other Links

Physics ECAT Pre Engineering Chapter 21 Nuclear 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