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 nucleus of tritium is called.

Question # 2

The average energy released per fission of U is about

Question # 3

In a Geiger Marsden experiment why do the great majority of the Alpha particles pass straight through the metal foil.

Question # 4

Most widely used types of gas LASER are

Question # 5

Transistors with various combinations are widely used as switches in.

Question # 6

Push pull amplifiers employ

Question # 7

Phenomenon of radioactivity is due to disintegration of.

Question # 8

Ionization of a hydrogen atom originally in its ground state takes a minimum out of energy equal to.

Question # 9

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

Question # 10

A photon is chasing an electron, whose speed is 0.9 c What is their relative speed.

Question # 11

In electromagnetic spectrum X-rays are next to.

Question # 12

Work function is generally expressed in.

Question # 13

The SI unit of equivalent dose is

Question # 14

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

Question # 15

An active component of an electronic circuit consisting of a small block of semiconducting material to which at least three electrical contacts are made is known as.

Question # 16

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

Question # 17

The transition of inner shell electrons in heavy atoms gives rise to the emission of.

Question # 18

Critical mass is the minimum mass needed for

Question # 19

X-rays are also used for

Question # 20

An oscillator is basically an amplifier with loop gain

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 When a beta particle travels though a medium it knocks out electrons from the atoms due to.
A. Gravitational force of attraction
B. Electrostatic force of repulsion
C. Nuclear force
D. Electromagnetic induction
2 When an electron and a positron are annihilated, then number of protons produced is.
A. 1
B. 2
C. 3
D. 4
3 The working of cloud chamber is based in the presence of.
A. Super heated vapours
B. Liquid
C. Super saturated vapors
D. Unsaturated vapours
4 One becquerel is equal to
A. Decay of orie radioactive atoms per second
B. Decay of 10 radioactive atoms per secnd
C. Decay of 100 radioactive atoms per second
D. Decay of infinity radioactive atoms per second.
5 In heavy atims the electrons are assumed to be arranged in.
A. Elliptical shells
B. Inner shells
C. Concentric shells
D. Outer shells
6 NOR gate is a combination of.
A. OR gate and NOT gate
B. OR gate and AND gate
C. OR gate and OR gate
D. NOT gate and AND gate
7 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
8 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
9 When an object moves with a very high speed the length in the direction of motion.
A. Contracts
B. Expands
C. Remains the same
D. Becomes infinity
10 Transistor are made from
A. Plastics
B. Metals
C. Insulators
D. Doped semiconductors

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