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

00:00
Question # 1

Which one of the following spectra series is in the ultraviolet region.

Question # 2

The half life of a radioactive substance is 6 years What is the time taken by 12 g of this substance to decay completely.

Question # 3

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

Question # 4

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

Question # 5

The critical mass of fissionable uranium -235 can be reduced by

Question # 6

Choose the one which acts as single inverter.

Question # 7

The critical mass of a fissionable material is.

Question # 8

An AND gate is.

Question # 9

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 # 10

In a resistor, when base width decreases with increasing Vbc, this phenomenon is called.

Question # 11

The Rutherford atom according to classical theory is

Question # 12

One radian is equal to.

Question # 13

The working of cloud chamber is based in the presence of.

Question # 14

When Photon incident on a metal produce the emission of electrons the process is called.

Question # 15

Why FET amplifiers are called voltage controlled devices.

Question # 16

Beta decay may occur by

Question # 17

Negative feedback

Question # 18

Deuterium is

Question # 19

The SI unit of current gain is.

Question # 20

At room temperature the potential difference between the two sides of depletion region for silicon is of the order of.

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 Which particle are not emitted by a radioactive substance.
A. Alpha particles
B. Beta particles
C. Gama particles
D. Neutrons
2 The term used for the emission of electrons when light strikes a surface.
A. The zeeman effect
B. The photo electric effect
C. Skin effect
D. Compton effect
3 X-rays are absorbed maximum by
A. Paper
B. Copper
C. Steel
D. Lead
4 The molecular weight of D2O is
A. 16
B. 18
C. 20
D. 24
5 Which of the following is basic transistor configuration.
A. CB
B. CC
C. CE
D. All of these
6 On which factor cut off wavelength of X-rays coming from a Coolidge tube depends upon.
A. Target material
B. Accelerating voltage
C. Filament temperature
D. Separation between target and the filament
7 The band width of an audio amplifier is.
A. 10 Hz to 10 kHz
B. 20 Hz to 54 Hz
C. 20 Hz to 20 kHz
D. 20 Hz to 60 kHz
8 The most readily fissionable isotope of uranium has atomic mass of
A. 234
B. 235
C. 236
D. 238
9 At what speed the mass of a body will be doubled.
A. 0.67 C
B. 0.77 C
C. 0.87 C
D. 0.97 C
10 Which of the following is not a mode of radioactive decay.
A. Positron emission
B. Electron capture
C. Fusion reaction
D. A decay

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