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

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PPSC Physics Topic 7 Modern Physics

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Question # 1

Bohr's atomic model assumes

Question # 2

In a Nuclear reactor which material is often used as modeerator.

Question # 3

Which one the following is not a component of a Bipolar junction Transistor

Question # 4

In a cloud chamber the Alpha particles leave

Question # 5

What will be excitation energy in the third orbit of hydrogen atom.

Question # 6

The nucleus of tritium is called.

Question # 7

The emission of photons by a metal when electrons are incident is called.

Question # 8

Binding energy per nucleon is.

Question # 9

Why FET amplifiers are called voltage controlled devices.

Question # 10

The advantage of electron tube over a transistor is.

Question # 11

Which one of the following has the largest wavelength.

Question # 12

White light a tungsten filament lamp is passed through sodium vapor and viewed through a diffraction gritting Which of the following best describes the spectrum which would be seen.

Question # 13

Though the wavelength of X-rays is smaller than that of visible light yet the speed of X-rays in vacuum is.

Question # 14

LED is a p-n junction that emits

Question # 15

In heavy atims the electrons are assumed to be arranged in.

Question # 16

The exitance of more than one distinct state with the same energy is called.

Question # 17

Marie Curie and Pierre Curie discovered two new radioactive elements which are.

Question # 18

The binding energy per nucleon for uranium is about.

Question # 19

The scientific theory concerning the coming into existence of universe.

Question # 20

The loss of mass in a.m.u in a nuclear change can be calculated from energy involved in MeV by

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 Cs - 137 is a radioisotope used ot determine the thickness of the walls of steel pipes Cs 137 is chosen because it emits
A. Radiowaves
B. Alpha particles
C. Beta particles
D. gama particles
2 The unit Planck's constant is equivalent to that of.
A. Energy
B. Force
C. Velocity
D. Angular momentum
3 The wavelength of Lyman series for hydrogen spectrum lies in the.
A. Visible region
B. Ultraviolet region
C. Infrared region
D. Far infrared region
4 Which of the following describes that the time interval between two events may be different in different of references
A. Simullaneously
B. Time dilation
C. Length contraction
D. Mass variation
5 Why FET amplifiers are called voltage controlled devices.
A. Input is a current signal
B. Output is a current signal
C. Input is a voltage signal
D. Output is a voltage signal
6 Which of the following atom pair have the same structure.
A. N, C
B. B, Li
C. H2 , Ne
D. Li , Na
7 If an object moves with velocity of light the apparent mass of the object as compared to list original mass is
A. greater
B. Smaller
C. Same
D. zero
8 The path of electron in Rutherford atomic model according to classical theory a.
A. Parabolic
B. Straight line
C. Spiral
D. Circular
9 Alpha particles are used for the treatment of skin of a patient due to.
A. Highly ionizing power
B. Low penetration power
C. Positively charged particles
D. Helium nucler
10 A freshly made sample of radioactive material gives a count rate of 8,000 counts per minute After twenty days it gives a count rate of 500 counts per minute What is the half life of the materials.
A. 5 days
B. 10 days
C. 40 days
D. 20 days

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