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 critical mass of fissionable uranium -235 can be reduced by

Question # 2

Mosley's law establishes the x rays fluorescence's of target element with its.

Question # 3

The process of energy generation in sun and stars is.

Question # 4

The critical mass of a fission reaction is.

Question # 5

Alpha particles are

Question # 6

What are isotopes.

Question # 7

Which of the following wavelength lies in X-rays region.

Question # 8

LASER is a device which can produce.

Question # 9

Positron are produced during.

Question # 10

What is the scale for measurement of Banbridge mass spectrograph.

Question # 11

Which of the following is required for maintaining sustained chain reaction.

Question # 12

Which of the following is not a mode of radioactive decay.

Question # 13

In scattering experiment which force scatters alpha particle.

Question # 14

The angular speed of an electron in the nth orbit of Bohr's hydrogen atom is.

Question # 15

The nucleus of tritium is called.

Question # 16

In a cloud chamber the Alpha particles leave

Question # 17

An increase in frequency above threshold frequency results in.

Question # 18

An operational amplifier can be used as a

Question # 19

A unijunction transistor

Question # 20

The Rutherford atom according to classical theory is

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 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
2 The SI unit of equivalent dose is
A. Seivert
B. Gray
C. Radian
D. Rem
3 At what speed the mass of a body will be doubled.
A. 0.67 C
B. 0.77 C
C. 0.87 C
D. 0.97 C
4 Mass -energy relation means that the product of mass times the square of the speed of light must be equal to.
A. Torque
B. Momentum
C. Energy
D. Impulse
5 Among different elements of the periodic table which of the following atoms is the simplest.
A. Carbon
B. Oxygen
C. Hydrogen
D. Nitrogen
6 The value of open loop gain for the amplifier is
A. zero
B. very low
C. very high
D. of an intermediate vaue
7 Neither the position nor the momentum of a particle can be predicted with arbitrarily great precision is the statement of.
A. Archimede's principle.
B. Heisenberg uncertainty principle
C. Mosley's law
D. Schrodinger's wave equation
8 As oscillator is basically an amplifier with loop gain
A. Zero
B. Infinity
C. Less than unity
D. More than unity
9 The half life of a radioactive substance as compared to its mean lif eis.
A. 30%
B. 50%
C. 70%
D. 90%
10 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.
A. Rectifier
B. Amplifier
C. Thermocouple
D. Transistor

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