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

A logic circuit with one input and one output that inverts the input signal at the output is.

Question # 2

An increase in frequency above threshold frequency results in.

Question # 3

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

Question # 4

The mass of an helium nucleus is equal to.

Question # 5

In the experiment of photo electric effect the minimum frequency of photons at which electrons are emitted from a metal surface is called.

Question # 6

The exitance of more than one distinct state with the same energy is called.

Question # 7

Which of the following phenomenon cannot be understood by quantum theory.

Question # 8

The half life of radium -226 is

Question # 9

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

Question # 10

The energy in electron volts necessary to remove the most loosely bound electron from the neutral atom is known as.

Question # 11

Choose the one which acts as single inverter.

Question # 12

The X-rays coming from a X-rays tube

Question # 13

The decay process in which an unstable nucleus splits into two fragments of comparable mass is known as.

Question # 14

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

Question # 15

A logic circuit whose output signal is '1' when inputs are different is.

Question # 16

The emission of electrons from a metal surface when exposed to light of suitable frequency is called.

Question # 17

In heavy elements of the periodic table the number of neutrons than protons are.

Question # 18

The most familiar example of radioactive dating is.

Question # 19

The mass of proton is equal to.

Question # 20

Which one of the following has the largest wavelength.

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 X-ray are
A. Streams of negatively charted particles.
B. Electromagnetic wave
C. Streams of positively charged particles
D. Visible light
2 LED is a p-n junction that emits
A. Visible light
B. X- rays
C. Ultraviolet light
D. electromagnetic waves
3 The number of electrons in U nucleus are.
A. 92
B. 235
C. zero
D. 143
4 Radioactivity is the phenomenon associated with the.
A. Transition of radiowaves
B. production of alpha particles only
C. Decay of nucleus
D. Reception of radio waves
5 The SI unit of radioactivity is.
A. Becquerl
B. Curie
C. Joule
D. rutherford
6 The usefulness of X rays is largely due to their
A. Mass
B. Density
C. Volume
D. Penetrating power
7 Which of the following particles leave no trail in a cloud chamber.
A. Electrons
B. Protons
C. Alpha particles
D. Neutrons
8 The X-rays coming from a X-rays tube
A. Is monochromatic
B. Has all wavelengths smaller than a certain maximum wavelength
C. Has all wavelengths greater than a certain maximum wavelength
D. has all wavelengths minimum than a certain maximum wavelength
9 An oscillator is basically an amplifier with loop gain
A. Zero
B. Less than unity
C. More than unity
D. Infinity
10 The average energy released per fission of U is about
A. 200 eV
B. 2 keV
C. 2 MeV
D. 200 MeV

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