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

Which uranium isotope having the atomic weights as given below is easily fissionable.

Question # 2

The binding energy per nucleon for uranium is about.

Question # 3

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

Question # 4

Sub atomic particles which experience strong nuclear force are.

Question # 5

Sub atomic paticles whihc does not experience strong nuclear force are.

Question # 6

The best shield against Gama rays would be of

Question # 7

The gama rays have

Question # 8

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

Question # 9

Deuterium is

Question # 10

Mosley's law establishes the x rays fluorescence's of target element with its.

Question # 11

When objects placed in a room are exposed to X- rays they appear

Question # 12

The molecular weight of D2O is

Question # 13

Radius of the Bother's orbit is r the radius of second orbit will be.

Question # 14

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

Question # 15

An increase in frequency above threshold frequency results in.

Question # 16

Why hydrogen atom does not emit x-rays.

Question # 17

The energy that must be added to separate the nucleus is called.

Question # 18

At high temperature a body generally emits redactions of.

Question # 19

The helium nucleus does not contain

Question # 20

What is the relativistic version of the Schrodinger equation.

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 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
2 Mosley's law establishes the x rays fluorescence's of target element with its.
A. Atomic weight
B. Atomic number
C. Density
D. Lattice constant
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 Which given quantity remains the same in isotones.
A. Mass number
B. Atomic number
C. Number of neutrons
D. Number of protons
5 The continuous X rays spectrum is due to an effect.
A. Bremsstrahlung
B. Breaking radiation
C. Holography
D. both a and b
6 Which of the following is invariant under Galilean transformation.
A. Velocity
B. Impulse
C. Momentum
D. Distance
7 A photon is chasing an electron, whose speed is 0.9 c What is their relative speed.
A. 0.1 C
B. C
C. 0.8 C
D. 0.9 C
8 The average energy released per fission of U is about
A. 200 eV
B. 2 keV
C. 2 MeV
D. 200 MeV
9 The advantage of electron tube over a transistor is.
A. Its high efficiency
B. Its high gain
C. Low consumption of power
D. Low input impedance
10 In potential for the material of cathode pure metals are rarely used because of their
A. Low reflecting power
B. High reflecting power
C. Low resolving power
D. High resolving power

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