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

Atomic reactor is based on

Question # 2

The change in wavelength of an X-ray when scattered from an electron is called.

Question # 3

The converse of pair production is

Question # 4

In n-p-n transistor the current flows in the direction from

Question # 5

Why FET amplifiers are called voltage controlled devices.

Question # 6

A gama ray of energy 1900 MeV is absorbed by

Question # 7

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

Question # 8

The possible values of principal quantum number are.

Question # 9

The mass of proton is equal to.

Question # 10

The chain reaction is controlled by a series of rods usually made of.

Question # 11

Which quantity remains fixed in isobars.

Question # 12

The band width of an audio amplifier is.

Question # 13

In CC configuration voltage gain is.

Question # 14

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

Question # 15

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

Question # 16

Which of the following is not a mode of radioactive decay

Question # 17

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.

Question # 18

Why is a capacitor resistor combination used in oscillators in grid circuit.

Question # 19

What is the energy equivalent to amu in Me V

Question # 20

Matter waves

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 Which of the following is not an electromagnetic wave.
A. game rays
B. Ultraviolet rays
C. Ultrasonic waves
D. Microwaves
2 The X-rays coming from a X-rays tube
A. Is monochromatic
B. Has all wavelengths smaller than a certain maximum wavelength
C. Has all wavelengths greater than a certain maximum wavelength
D. has all wavelengths minimum than a certain maximum wavelength
3 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.
4 Cosmic rays mostly comprise of
A. Neutral particles
B. Negative charged particles
C. Positively charged particles
D. Ions
5 Which of the following is not a mode of radioactive decay
A. Nuclear fusion
B. Alpha decay
C. Electron capture
D. Positron emission
6 The loss of mass in a.m.u in a nuclear change can be calculated from energy involved in MeV by
A. Dividing by 931
B. Multiplying by 931
C. Diving by 391
D. Multiplying by 391
7 The input resistance of a JFET is of the order of.
A. 1 M Mega
B. 10 M Mega
C. 100 M Mega
D. 1,000 M Mega
8 Special theory of relativity deals with the events in the frames of reference which move with constant.
A. Time interval
B. Acceleration
C. Momentum
D. space interval
9 On which factor cut off wavelength of X-rays coming from a Coolidge tube depends upon.
A. Target material
B. Accelerating voltage
C. Filament temperature
D. Separation between target and the filament
10 Half life and mean lifetime of a radioactive element are.
A. Equal to each other
B. Inversely proportional to each other
C. Directly proportional to each other
D. Not related to each other

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