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

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  • Time Allowed20

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PPSC Physics Topic 7 Modern Physics

00:00
Question # 1

Special theory of relativity deals with the events in the frames of reference which move with constant.

Question # 2

The phenomenon in which a photon of frequency 'f' is scattered by an electron and the scattered photon has frequency f <f is known as.

Question # 3

The ionization energy for hydrogen atom is

Question # 4

An Alpha particle is the same as

Question # 5

The total energy of an electron in an orbit around the nucleus is.

Question # 6

The gama rays have

Question # 7

The half life of a given radioactive isotope is 10 years The original mass of the isotope is 12 g What mass of this isotope remains un decayed after 20 years.

Question # 8

The phenomenon is which the wavelength of scattered X-rays is larger than the incident X-rays is known as.

Question # 9

What is the overall gain, if three amplifiers each with a gain of 30 are cacaded.

Question # 10

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 # 11

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

Question # 12

Which particle has zero charge and zero rest mass.

Question # 13

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

Question # 14

The unit of Rydberg constant R is

Question # 15

The nucleus of tritium is called.

Question # 16

The potential due to which an electron is lifted from gerund state to excited state is.

Question # 17

Which of the following detectors can count fast and operate at low voltage.

Question # 18

Which one of the following quantities is conserved in a nuclear reactor.

Question # 19

Which one among these contacts in a transistor is non rectifying.

Question # 20

When a beta particle travels though a medium it knocks out electrons from the atoms due to.

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 In CC configuration voltage gain is.
A. Less than one
B. More than one
C. One
D. Zero
2 In the experiment of production of X rays electrons are accelerated towards the anode by
A. Thermionic emission
B. Potential difference
C. Breaking potential
D. Cut of current
3 A deuteron is
A. A type of proton
B. A proton neutron bounded to gather.
C. A type of beta particle
D. A type of neutron
4 The charge on a helium nucleus is equal to the charge of.
A. Two electrons
B. Two protons
C. Two neutrons
D. One proton
5 According to Max. Planck, energy is released or absorbed in discrete packets called.
A. quanta
B. Meson
C. Energy shells
D. Position
6 Which one of the following gates in a a universal gate.
A. OR
B. AND
C. NOT
D. NAND
7 Which one among these contacts in a transistor is non rectifying.
A. Base
B. Emitter
C. Collector
D. None of these
8 The change in wavelength of an X-ray when scattered from an electron is called.
A. Compton shift
B. Doppler shift
C. Stefan's law
D. Fraunhofer lines
9 When a posirtron is emitted it causes.
A. Mass number to increase by one
B. mass number to decrease by one
C. Atomic number to decrease by one
D. Atomic number to increase by one
10 Choose the one which acts as single inverter.
A. Common emitter
B. common collector
C. Common base
D. Diode

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