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

PPSC Physics Topic 7 Modern Physics

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Question # 1

X-rays are

Question # 2

The possible values of principal quantum number are.

Question # 3

Which of the following causes the deflection of Alpha particles when they re passed through a thin foil.

Question # 4

The radius of first Bohr's orbit for hydrogen atom is.

Question # 5

The molecular weight of D2O is

Question # 6

Which of the following is the most commonly used regions of operations for a transistor.

Question # 7

The back ground radiation in the atmosphere on the average is

Question # 8

the alpha particle does not travel for enough in air.

Question # 9

In Compton's effect the change in wavelength of a scattered photon is called.

Question # 10

The splitting of atomic energy levels and the associated spectrum lines when the atoms are placed in a magnetic field is called.

Question # 11

Radioactivity is the phenomenon associated with the.

Question # 12

An example of continuous spectrum is.

Question # 13

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

Question # 14

The emission of Beta particle from protonium -218 results in the formation of.

Question # 15

The decay to form other nuclides by emitting particles and electromagnetic radiations by unstable nuclides is called.

Question # 16

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

Question # 17

Negative feedback

Question # 18

In which of the following controlled nuclear chain reaction is used to liberate energy.

Question # 19

The maximum K.E. with which photoelectrons are emitted depends very strongly on the.

Question # 20

The process by which nuclei emit a ,b and gama rays in order to attain stability is called.

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 The phenomenon of Compton's effect process that right has
A. Wave nature
B. Particle nature
C. Dual nature
D. Corpuscular nature
2 Which particles have spin quantum number 1/2
A. Mesons
B. Laptons
C. Hadrons
D. Muons
3 Isotopes are the atoms of the same elements which contain equal number of.
A. Nucleus
B. Neutrons
C. Protons
D. Electrons
4 Which one of the following spectra series is in the ultraviolet region.
A. Lyman series
B. Paschen series
C. Brackett series
D. Plund series
5 Cs - 137 is a radioisotope used ot determine the thickness of the walls of steel pipes Cs 137 is chosen because it emits
A. Radiowaves
B. Alpha particles
C. Beta particles
D. gama particles
6 Which of the following properties is not exhibited by X-rays.
A. Interference
B. Diffraction
C. Polarization
D. Deflection of electric field
7 When an electron and a positron are annihilated, then number of protons produced is.
A. 1
B. 2
C. 3
D. 4
8 A logic circuit with one input and one output that inverts the input signal at the output is.
A. AND gate
B. NOT gate
C. OR gate
D. NOR gate
9 X-rays are also used for
A. Ultrasound imaging
B. endoscopy
C. Computerized tomography scanning
D. Magnetic resonance imaging scanning
10 The angular speed of an electron in the nth orbit of Bohr's hydrogen atom is.
A. Directly proportional to n
B. Directly proportional to n2
C. Inversely proportional to n
D. Inversely proportional to n2

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