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

00:00
Question # 1

The half life of a radioactive substance is 6 years What is the time taken by 12 g of this substance to decay completely.

Question # 2

Which of the following is invariant under Galilean transformation.

Question # 3

The possible values of principal quantum number are.

Question # 4

The output of two input OR gate is zero only when its.

Question # 5

Which of the following propagates at the same speed as velocity of light.

Question # 6

One particle having zero mass and zero charge is.

Question # 7

The bunding energy per nucleon for iron is.

Question # 8

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

Question # 9

What is the energy equivalent to amu in Me V

Question # 10

A logic circuit whose output signal is '1' when inputs are different is.

Question # 11

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

Question # 12

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

Question # 13

X-ray are

Question # 14

the alpha particle does not travel for enough in air.

Question # 15

Neither the position nor the momentum of a particle can be predicted with arbitrarily great precision is the statement of.

Question # 16

The splitting of atomic energy levels and the associated spectrum lines when the atoms are placed in a magnetic field is called.

Question # 17

The advantage of electron tube over semiconductor is.

Question # 18

The input exultation for a JFET is

Question # 19

Nuclear force as compared to electrostatic force is.

Question # 20

One becquerel is equal to

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 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
2 The wavelength of Lyman series for hydrogen spectrum lies in the.
A. Visible region
B. Ultraviolet region
C. Infrared region
D. Far infrared region
3 The possible values of principal quantum number are.
A. only zero
B. 0,1,2,...................7
C. 1,2,3........................8
D. 2,3,4,6...............10
4 Current gain of a CE amplifier is 50, ITS hfe is about
A. 25
B. 50
C. 75
D. 100
5 X-rays spectrum may be
A. Continuous spectrum
B. Discontinuous spectrum
C. Line spectrum
D. Continuous and line spectrum
6 The process by which nuclei emit a ,b and gama rays in order to attain stability is called.
A. Radioactive disintegration
B. Radio activity
C. B decay
D. Radioactive transmulation
7 The critical mass of fissionable uranium -235 can be reduced by
A. Adding impurities to it
B. Heating the material
C. surrounding it by neutron reflecting material
D. Surrounding it by neutron absorbing material
8 One gray is equal to.
A. 1 J-1 kg -1
B. 1 J -1 kg -2
C. 1 J 1 -g-1
D. 1 j kg -2
9 A CE amplifier with by passed emitter resistor is an example of.
A. Current series feedback
B. Voltage sires feed back
C. Current shunt feedback
D. Voltage shunt feed back
10 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

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