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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PPSC Physics Topic 7 Modern Physics

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Question # 1

The neutral atoms of all isotopes of the same element contain the same numbers of.

Question # 2

An increase in frequency above threshold frequency results in.

Question # 3

An operational amplifier have how many input terminals.

Question # 4

Deuterium is

Question # 5

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.

Question # 6

Specially designed solid state detector can be used to detect.

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

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

Question # 9

The input exultation for a JFET is

Question # 10

If we use two diodes and a centre tapped transformer we eill get

Question # 11

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 # 12

A solid state detector is basically

Question # 13

In CC configuration voltage gain is.

Question # 14

When a posirtron is emitted it causes.

Question # 15

The total energy of the hydrogen atom is

Question # 16

Which term given below refers to the concept moving clocks run slower than clocks at rest w.r.t an observer.

Question # 17

Which particle interact via all fundamental forces.

Question # 18

Which of the following particles leave no trail in a cloud chamber.

Question # 19

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

Question # 20

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.

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 Both xenon and cesium each have
A. 24 isotopes
B. 28 isotopes
C. 32 isotopes
D. 36 isotopes
2 What will be excitation energy in the third orbit of hydrogen atom.
A. 0.66 eV
B. 0.85 eV
C. 1.5 eV
D. 5.4 eV
3 The continuous X rays spectrum is due to an effect.
A. Bremsstrahlung
B. Breaking radiation
C. Holography
D. both a and b
4 The process of conversation of a photon into an electron and a position is called.
A. Pair annihilations
B. Pair production
C. Photoelectric effect
D. Compton effect
5 The critical mass of a fissionable material is.
A. 1 kg
B. 10 kg
C. 100 kg
D. 1.,000 kg
6 Which of the following particles leave no trail in a cloud chamber.
A. Electrons
B. Protons
C. Alpha particles
D. Neutrons
7 When Photon incident on a metal produce the emission of electrons the process is called.
A. Photo electric effect
B. Pair production
C. x-rays production
D. Gama ray production
8 The mass of proton is equal to.
A. 1.673 x 10-27 kg
B. 1.673 x 1027 kg
C. 9.1 x 10-31 kg
D. 9.1 x 1031 kg
9 Marie Curie and Pierre Curie discovered two new radioactive elements which are.
A. Uranium and radkum
B. Platinum and radium
C. Polonium and radium
D. Crypton and radon
10 Which particle interact via all fundamental forces.
A. Leptons
B. Hadrons
C. Muons
D. mesons

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