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

Try The MCQ's Test For PPSC Physics Topic 7 Modern Physics

  • Total Questions20

  • Time Allowed20

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PPSC Physics Topic 7 Modern Physics

00:00
Question # 1

Cobalt -60 is a radioactive element with half life of 5.25 years. What fraction of the original sample will be left after 26 years.

Question # 2

From which radiation it is most difficult to protect oneslelf.

Question # 3

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

Question # 4

The converse of pair production is

Question # 5

Radioactive substances do not emit

Question # 6

The most familiar example of radioactive dating is.

Question # 7

In a nuclear reactor chani reaction is controlled by introducing.

Question # 8

There are how many modes of operations of a BJT.

Question # 9

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

Question # 10

Which temperature is required for the fusion of two nuclides.

Question # 11

The binding energy to pull the deuterium H apart into a proton and a neutron is equal to.

Question # 12

The wavelength of X-rays is of the ofder of.

Question # 13

Which of the following properties is not exhibited by X-rays.

Question # 14

A factory buy 100 g of a radioactive chemical with a half life of 5 years which decays to a stable compound How much of the chemical will still be radioactive 10 years time.

Question # 15

The resistance between(+) and (-) inputs of an amplifier is.

Question # 16

Lissajou's figures are used in a Cathode Ray Oscilloscope while measuring.

Question # 17

Half life and mean lifetime of a radioactive element are.

Question # 18

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

Question # 19

A perfect back body

Question # 20

The unit generally used for measuring astronomical distances is.

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The half life of isotopes X is four days and its initial mass is 32 mg What mass of the isotope X will remain after twelve days.
A. 2 mg
B. 4 mg
C. 8 mg
D. 18 mg
4 The unit of Rydberg constant R is
A. m
B. m3
C. m-1
D. m-2
5 One radian is equal to.
A. 0.1 Gy
B. 0.01 Gy
C. 0.001 Gy
D. 0.0001 gy
6 The absorption of X-rays in a given material follows.
A. A parabola path
B. Is straight line
C. An exponential curve
D. A circle
7 Specially designed solid state detector can be used to detect.
A. Alpha particles
B. Beta particles
C. Gama rays
D. X- rays
8 Which of the following are electromagnetic waves.
A. Alpha particles
B. Beta particles
C. Gama rays
D. Water waves
9 When transistor works as an amplifier, its output is.
A. More
B. Less
C. Zero
D. Directly proportional to the input
10 Cobalt -60 is a radioactive element with half life of 5.25 years. What fraction of the original sample will be left after 26 years.
A. 1/4
B. 1/8
C. 1/16
D. 1/32

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