PPSC Physics Topic 7 MCQ Test With Answer

Prepare Modern Physics and all other important topics with PPSC Physics online test. Modern Physics is a term that is used to describe all the discoveries and observations that made physicists rethink their understanding of Physics in the 19th and 20th centuries. In this day and age, one can't study Physics without having a firm understanding of concepts of Modern Physics. That’s why seekers for PPSC Physics jobs need to understand the subject of Modern Physics. Examiners ask many questions from this topic in the PPSC Physics test.

To make the PPSC exam preparation easier for you, team IlmKiDunya.com has created the PPSC Physics online test portal. On this page, you can attempt the PPSC online test MCQs about Modern Physics. Many students complain that they don’t find information about the PPSC Physics exam preparation. We at IlmKiDunya.com bring PPSC online test to your fingertips so you can prepare quickly for the test.

MCQ's Test For PPSC Physics Topic 7 Modern Physics

Try The MCQ's Test For PPSC Physics Topic 7 Modern Physics

  • Total Questions20

  • Time Allowed20

PPSC Physics Topic 7 Modern Physics

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Question # 1

Cs - 137 is a radioisotope used ot determine the thickness of the walls of steel pipes Cs 137 is chosen because it emits

Question # 2

In order to reduce uncertainty in momentum one must use light of.

Question # 3

The tunnel effect makes possible

Question # 4

Which of the following can be used as an arrester in a nuclear reactor.

Question # 5

The working of cloud chamber is based in the presence of.

Question # 6

When a posirtron is emitted it causes.

Question # 7

LED is a p-n junction that emits

Question # 8

Which one among these contacts in a transistor is non rectifying.

Question # 9

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

Question # 10

The total energy of the hydrogen atom is

Question # 11

The advantage of electron tube over semiconductor is.

Question # 12

If the base emitter junction is forward biased and base collector junction is reverse biased the BJT is in.

Question # 13

The charge on a helium nucleus is equal to the charge of.

Question # 14

The process of pair production will take place if the energy of photon is greater than.

Question # 15

the gain of an amplifier is independent of

Question # 16

One gray is equal to.

Question # 17

Which of the following is the most commonly used regions of operations for a transistor.

Question # 18

Which of the following phenomenon is explained by the tunnel efffect.

Question # 19

The half life of a radioactive element depends upon.

Question # 20

The average energy released per fission of U is about

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 Radius of the Bother's orbit is r the radius of second orbit will be.
A. 2 r
B. 3 r
C. 4 r
D. 8 r
2 Choose the one which acts as single inverter.
A. Common emitter
B. common collector
C. Common base
D. Diode
3 The photons emitted in inner shell transition are.
A. Alpha particle
B. Beta particle
C. Gama particle
D. Characteristic X-rays
4 Which six particles and their antiparticles interact by the weak interaction.
A. Leptons
B. Hadrons
C. Muons
D. pi mesons
5 LASER beam my be measure very large distance because it is.
A. Inidirectional
B. coherent
C. Monochromatic
D. Not absorbed
6 What will be excitation energy in the third orbit of hydrogen atom.
A. 0.66 eV
B. 0.85 eV
C. 1.5 eV
D. 5.4 eV
7 Push pull amplifiers employ
A. One transistor
B. Two transistors
C. Three transistors
D. Four transistors
8 Which of the following particles leave no trail in a cloud chamber.
A. Electrons
B. Protons
C. Alpha particles
D. Neutrons
9 X-rays are
A. Longitudinal wave
B. Transvers waves
C. Secondary waves
D. Fast sound waves
10 Which temperature is required for the fusion of two nuclides.
A. 106 K
B. 107 K
C. 10 8 K
D. 10 9 K

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