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

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

Question # 2

X-rays are

Question # 3

The minimum amount of energy in an individual electron has to gain to escape from a particular surface is called.

Question # 4

A CE amplifier with by passed emitter resistor is an example of.

Question # 5

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

Question # 6

Compton scattering experiment seemed to indicate that radiation had

Question # 7

The maximum K.E of photo electrons depends upon

Question # 8

LASER is a device which can produce.

Question # 9

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

Question # 10

The SI unit of absorbed dose in.

Question # 11

X-ray are

Question # 12

The advantage of electron tube over a transistor is.

Question # 13

In annitilation of matter, positron and electron pair disappears into two

Question # 14

The two elements with same number of electrons but different mass number are called.

Question # 15

The constant lamda is called the.

Question # 16

The emission of electrons from a metal surface when exposed to light of suitable frequency is called.

Question # 17

The reciprocal of decay constant lamda of a radioactive substances is equal to.

Question # 18

In CE amplifier phased reversal occurs when the output voltage is taken between

Question # 19

The mass of an helium nucleus is equal to.

Question # 20

The mass defect of Bohr's atomic model is

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 The electrons behave as waves, because they can .
A. Produce ions in gases
B. Diffracted by a crystal
C. Be deflected by electric fields
D. Be deflected by magnetic fields
2 Which of the following atom pair have the same structure.
A. N, C
B. B, Li
C. H2 , Ne
D. Li , Na
3 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
4 The relationship between mass number atomic number and neutron number is.
A. A = Z + N
B. A = Z - N
C. Z = A + N
D. N = Z - A
5 In an electronic transition atom cannot emit
A. Gama rays
B. Visible rays
C. Infrared rays
D. Ultraviolet rays
6 x-rays cannot produce
A. Photoelectron
B. Compton electron
C. Electron positron pair
D. All of these
7 In a cloud chamber the Alpha particles leave
A. Dense, straight and continuous tracks
B. Only straight and continuous tracks
C. Thin and discontinuous tracks
D. Irregular tracks
8 What is the effect of electric and magnetic fields on X-rays
A. X-rays are deflected
B. X-rays are not deflected
C. X-rays are sometimes deflected and sometimes not
D. Nothing can be said
9 The gama rays have
A. Thin tracks
B. Thick tracks
C. No definite tracks
D. Continuous tracks
10 Which both elements are good for nuclear fission.
A. Thorium an uranium
B. Thorium and radium
C. Plutonium and uranium
D. Plutonium and throrium

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