Question # 1

Which particle is removed by a photon.

Choose an answer

Quark

Electron

Proton

Neutron

Particle which can be added to the nucleus of an atom with changing its chemical properties are called.

Choose an answer

Electrons

Protons

Neutrons

Alpha particles

Both xenon and cesium each have

Choose an answer

24 isotopes

28 isotopes

32 isotopes

36 isotopes

The possible values of principal quantum number are.

Choose an answer

only zero

0,1,2,...................7

1,2,3........................8

2,3,4,6...............10

Which of the following causes the deflection of Alpha particles when they re passed through a thin foil.

Choose an answer

Attraction of nucleus

Collision with nuclei

Interactions with electrons

Electrostatic repulsion by the nucleus

The path of Gama rays in Wilson cloud chamber is

Choose an answer

Irregular

Dense and straight

Thin and continuous

Thin and discontinuous

The total energy of an electron in an orbit around the nucleus is.

Choose an answer

Zero

Unity

Infinity

Negative

During transition, atom cannot emit

Choose an answer

Visible light

Ultraviolet radiation

Infrared radiations

gama rays

Which of the following is formed by decay of a free neurton.

Choose an answer

A number of electrons

Two protons

A proton and an electron

An alpha particle

A photon is chasing an electron, whose speed is 0.9 c What is their relative speed.

Choose an answer

0.1 C

C

0.8 C

0.9 C

Positron are produced during.

Choose an answer

Annihilation

ionization

Pair production

x rays production

Current gain of a CE amplifier is 50, ITS hfe is about

Choose an answer

25

50

75

100

Which given element has lowest work function

Choose an answer

Na

Al

si

C

Ionization of a hydrogen atom originally in its ground state takes a minimum out of energy equal to.

Choose an answer

2.4 J

4.2 J

12.3 eV

13.6 eV

The energy equivalent of 1 kg of matter a

Choose an answer

10^-15 J

1 J

10¹²J

10¹⁷ J

Among different elements of the periodic table which of the following atoms is the simplest.

Choose an answer

Carbon

Oxygen

Hydrogen

Nitrogen

X-rays are

Choose an answer

Longitudinal wave

Transvers waves

Secondary waves

Fast sound waves

When we pass a radiation from a radioactive material through an electric field.

Choose an answer

All three kinds of rays will be deflected

Only the Gama rays are deflected

The Alpha and Beta particles are deflected

Only the alpha particles are deflected

The electrons behave as waves, because they can .

Choose an answer

Produce ions in gases

Diffracted by a crystal

Be deflected by electric fields

Be deflected by magnetic fields

The bunding energy per nucleon for iron is.

Choose an answer

zero

Maximum

Negative

Minimum

Work function is generally expressed in.

Choose an answer

Electron volt

Joules

Newtons

Gauss

More Classes

Other Links

PPSC Physics Chapter 7 Modern Physics 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

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer