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

PPSC Physics Topic 7 Modern Physics

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Question # 1

Ashes from a campfire deep in a cave show carbon -14 activity of only one eighth the activity of fresh wood. How long ago was that campfire made.

Question # 2

The loss of mass in a.m.u in a nuclear change can be calculated from energy involved in MeV by

Question # 3

What is the relativistic version of the Schrodinger equation.

Question # 4

The Compton effect in X-rays proves that

Question # 5

A device used to determine mass of an isotope quite accurately is known as.

Question # 6

Though the wavelength of X-rays is smaller than that of visible light yet the speed of X-rays in vacuum is.

Question # 7

The path of electron in Rutherford atomic model according to classical theory a.

Question # 8

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

Question # 9

An operational amplifier have how many input terminals.

Question # 10

The critical mass of a fission reaction is.

Question # 11

Which of the following quantities is discrete according to Bohr's hypothesis.

Question # 12

Alpha particles are used for the treatment of skin of a patient due to.

Question # 13

The reciprocal of decay constant lamda of a radioactive element is.

Question # 14

In the experiment of production of X rays electrons are accelerated towards the anode by

Question # 15

Which of the following can be used as an arrester in a nuclear reactor.

Question # 16

A single quantum of electromagnetic radiation is termed as.

Question # 17

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

Question # 18

At high temperature a body generally emits redactions of.

Question # 19

In a cloud chamber the Alpha particles leave

Question # 20

Which of the following is its own anti particle.

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 The molecular weight of D2O is
A. 16
B. 18
C. 20
D. 24
2 The half life of a radioactive element depends upon.
A. Temperature
B. pressure
C. nature of element
D. quantity of the element
3 48 days after the receipt the amount of iodine -131 left behind is only.
A. 0.1325 g
B. 0.2135 g
C. 0.3125 g
D. 0.1235 g
4 The SI unit of absorbed dose in.
A. Bel
B. Weber
C. Rem
D. Grey
5 Magnetic field does not cause deflection in
A. Alpha particle
B. Beta minus particles
C. Beta plus particles
D. Gama rays
6 X-rays are not used in RADARs because
A. They are not reflected by the target
B. they are not completely absorbed by air
C. They damage the target
D. They are reflected by the target
7 Which particle are not emitted by a radioactive substance.
A. Alpha particles
B. Beta particles
C. Gama particles
D. Neutrons
8 The angular speed of an electron in the nth orbit of Bohr's hydrogen atom is.
A. Directly proportional to n
B. Directly proportional to n2
C. Inversely proportional to n
D. Inversely proportional to n2
9 In a fission reactor which particle causes a uranium -235 nucleus to split.
A. Alpha particle
B. Gama ray
C. Neutron
D. Proton
10 The half life of a radioactive substance depend on.
A. Pressure
B. Temperature
C. Amount of substance
D. No external influences

Test Questions

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