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

Which of the following describes that the time interval between two events may be different in different of references

Question # 2

Which of the following are electromagnetic waves.

Question # 3

Nuclear force as compared to electrostatic force is.

Question # 4

The mass of an helium nucleus is equal to.

Question # 5

The term used for the emission of electrons when light strikes a surface.

Question # 6

An emitter follower has

Question # 7

Which of the following phenomenon is observed in obtaining an X ray photograph of our hand.

Question # 8

Why transistor is preferred to triode valve for use as an amplifier.

Question # 9

The half life of a radioactive substance is 6 years What is the time taken by 12 g of this substance to decay completely.

Question # 10

During transition, atom cannot emit

Question # 11

The electron behave an waves because

Question # 12

Why FET amplifiers are called voltage controlled devices.

Question # 13

When an electron and a positron are annihilated, then number of protons produced is.

Question # 14

Radioactive substances do not emit

Question # 15

A unijunction transistor

Question # 16

Hydrogen bomb is based on

Question # 17

The maximum K.E. with which photoelectrons are emitted depends very strongly on the.

Question # 18

A solid state detector is basically

Question # 19

How positives feedback will effect an amplifier.

Question # 20

The wavelength of Lyman series for hydrogen spectrum lies in the.

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 The emission of electrons from a metal surface when exposed to light of suitable frequency is called.
A. Pair production
B. Compton effect
C. Photo electric effect
D. Zeeman effect
2 In radiotherapy X-rays are used to.
A. Treat cancer
B. Delect bone fracture
C. Cure heart diseasee
D. All of the above
3 The radius of second orbit of hydrogen atom is
A. 0.071 A
B. 0.142 A
C. 4.752 A
D. 9.5298 A
4 The total number nucleons in a nucleus are called.
A. Mass number
B. Atomic number
C. Neutron number
D. Isotopes
5 Which six particles and their antiparticles interact by the weak interaction.
A. Leptons
B. Hadrons
C. Muons
D. pi mesons
6 The necessary condition for nuclear fusion is.
A. High temperature and high pressure.
B. Low temperature and high pressure
C. Low temperature and low pressure
D. High temperature and low pressure.
7 Current gain of a CE amplifier is 50, ITS hfe is about
A. 25
B. 50
C. 75
D. 100
8 In electromagnetic spectrum X-rays are next to.
A. Water waves
B. Radio waves
C. ultraviolet waves
D. Infrared waves
9 The half life of a given radioactive isotope is 10 years The original mass of the isotope is 12 g What mass of this isotope remains un decayed after 20 years.
A. 0.5 g
B. 1.2 g
C. 3.0 g
D. 6.0 g
10 Which of the following has the highest relative biological effectiveness or the quality factor.
A. X rays and Gama rays
B. Electrons
C. Photons
D. Alpha particles

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