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

One rem is equal to.

Question # 2

Which temperature is required for the fusion of two nuclides.

Question # 3

What is the effect of electric and magnetic fields on X-rays

Question # 4

The process by which nuclei emit a ,b and gama rays in order to attain stability is called.

Question # 5

The half life of a radioactive element depends upon.

Question # 6

The total number nucleons in a nucleus are called.

Question # 7

Mass -energy relation means that the product of mass times the square of the speed of light must be equal to.

Question # 8

Most widely used types of gas LASER are

Question # 9

On which factor cut off wavelength of X-rays coming from a Coolidge tube depends upon.

Question # 10

The unit generally used for measuring astronomical distances is.

Question # 11

As the mass number increases, the binding energy per nucleon in a nucleus

Question # 12

At high temperature a body generally emits redactions of.

Question # 13

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

Question # 14

The half life of radium -226 is

Question # 15

The decay process in which an unstable nucleus splits into two fragments of comparable mass is known as.

Question # 16

The electrons behave as waves, because they can .

Question # 17

The molecular weight of D2O is

Question # 18

A body moves with velocity of 2 x 106 m s-1 its relativistic mass becomes

Question # 19

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

Question # 20

The relationship between mass number atomic number and neutron number is.

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 Why is a capacitor resistor combination used in oscillators in grid circuit.
A. To generate oscillation
B. To bias the grid automatically
C. To amplify oscillations
D. To sustain the oscillations.
2 When using the formula E = h lambda what unit should energy have.
A. Joule
B. Watt second
C. Newton metre
D. Electron volt
3 In the experiment of production of X rays electrons are accelerated towards the anode by
A. Thermionic emission
B. Potential difference
C. Breaking potential
D. Cut of current
4 Which experiment is a demonstration that matter and energy can display properties of both waves and particles.
A. young's double slit experiment
B. Division germier experiment
C. Heisenberg's uncertainty experiment
D. Stern Gerlach experiment
5 A newly prepared radioactive nuclide has a decay constant Lamda of 10-6 s-1 What is the approximate half life of the nuclide.
A. 1 hour
B. 1 day
C. 1 week
D. 1 month
6 The force that bonds protons and neutrons together int he nucleus despite the electrical repulsion of the protons is called.
A. Molecular force
B. Nuclear force
C. Atomic force
D. Gravitational force
7 Which given quantity remains the same in isotones.
A. Mass number
B. Atomic number
C. Number of neutrons
D. Number of protons
8 The division and germier experiment relates to
A. Diffusion
B. interference
C. Polarization
D. Electron diffraction
9 Which one of the following is a convenient energy unit to express the energy of sub atomic particles.
A. Joule
B. electron volt
C. Watt
D. Curie
10 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

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