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

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PPSC Physics Topic 7 Modern Physics

00:00
Question # 1

The particles equal in mass or greater than protons are called.

Question # 2

LASER is a device which can produce.

Question # 3

Current gain of a CE amplifier is 50, ITS hfe is about

Question # 4

Which of the following radiations can penetrate 20 cm thick steel.

Question # 5

The electron behave an waves because

Question # 6

Isotopes are the atoms of the same elements which contain equal number of.

Question # 7

The force that bonds protons and neutrons together int he nucleus despite the electrical repulsion of the protons is called.

Question # 8

The emission of photons by a metal when electrons are incident is called.

Question # 9

In the fusion process, there are

Question # 10

The tunnel effect makes possible

Question # 11

Sub atomic particles which experience strong nuclear force are.

Question # 12

The gama rays have

Question # 13

The mass of an helium nucleus is equal to.

Question # 14

In electromagnetic spectrum X-rays are next to.

Question # 15

One particle having zero mass and zero charge is.

Question # 16

The energy equivalent of 1 kg of matter a

Question # 17

Two electrons approach each other their relative velocity will be.

Question # 18

Which one of the following gates in a a universal gate.

Question # 19

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

Question # 20

Which of the following wavelength lies in X-rays region.

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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 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 Lines of Balmer series are emitted by hydrogen atom when the electron jumps from
A. The first orbit to any other orbit
B. Higher orbits to second orbit
C. Higher orbits to first orbit
D. The third orbit to higher orbit
4 Which of the following describes that the time interval between two events may be different in different of references
A. Simullaneously
B. Time dilation
C. Length contraction
D. Mass variation
5 When an electron and a positron are annihilated, then number of protons produced is.
A. 1
B. 2
C. 3
D. 4
6 Which of the following quantities is discrete according to Bohr's hypothesis.
A. Momentum
B.
Potential energy
C. Angular velocity
D. Angular momentum
7 The phenomenon of radioactivity is associated with
A. Decay of nucleus
B. Decay of atoms
C. Fusion of nuclei
D. Emission of electrons
8 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.
A. Pair production
B. Pair annihilations
C. Photoelectric effect
D. Compton's effect
9 When an object moves with a very high speed the length in the direction of motion.
A. Contracts
B. Expands
C. Remains the same
D. Becomes infinity
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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