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

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Question # 1

An increase in frequency above threshold frequency results in.

Question # 2

Matter waves

Question # 3

The two elements with same number of electrons but different mass number are called.

Question # 4

The back ground radiation in the atmosphere on the average is

Question # 5

Which particle are not emitted by a radioactive substance.

Question # 6

When an electron and a positron are annihilated, then number of protons produced is.

Question # 7

Marie Curie and Pierre Curie discovered two new radioactive elements which are.

Question # 8

the wavelength of continuous X-rays is inversely proportional to.

Question # 9

Radioactivity is the phenomenon associated with the.

Question # 10

Usually in an operational amplifier the inputs used are of

Question # 11

Which particle has zero charge and zero rest mass.

Question # 12

Most widely used types of gas LASER are

Question # 13

The wavelength of Lyman series for hydrogen spectrum lies in the.

Question # 14

A device used to determine mass of an isotope quite accurately is known as.

Question # 15

According to Max. Planck, energy is released or absorbed in discrete packets called.

Question # 16

An active component of an electronic circuit consisting of a small block of semiconducting material to which at least three electrical contacts are made is known as.

Question # 17

Which of the following is invariant under Galilean transformation.

Question # 18

If the base emitter junction is forward biased and base collector junction is reverse biased the BJT is in.

Question # 19

An example of continuous spectrum is.

Question # 20

In potential for the material of cathode pure metals are rarely used because of their

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 The resistance between(+) and (-) inputs of an amplifier is.
A. Zero
B. Low
C. High
D. Infinity
2 What are isotopes.
A. Atoms of the same element with different numbers of neutrons.
B. Atoms of the same element with different numbers of protons.
C. Atoms which are radioactive
D. Atoms which have gained or lost an electron
3 In heavy elements of the periodic table the number of neutrons than protons are.
A. Lesser
B. Greater
C. Equal
D. Undetermined
4 The energy equivalent of 1 kg of matter a
A. 10-15 J
B. 1 J
C. 1012J
D. 1017 J
5 The tunnel effect makes possible
A. Alpha decay
B. Gama rays
C. Positive Beta decay
D. negative Beta dacay
6 The binding energy to pull the deuterium H apart into a proton and a neutron is equal to.
A. 1.22 MeV
B. 2.22 MeV
C. 3.22 Mev
D. 4.22 MeV
7 When a posirtron is emitted it causes.
A. Mass number to increase by one
B. mass number to decrease by one
C. Atomic number to decrease by one
D. Atomic number to increase by one
8 Current gain of a CE amplifier is 50, ITS hfe is about
A. 25
B. 50
C. 75
D. 100
9 A freshly made sample of radioactive material gives a count rate of 8,000 counts per minute After twenty days it gives a count rate of 500 counts per minute What is the half life of the materials.
A. 5 days
B. 10 days
C. 40 days
D. 20 days
10 Transistor stands for
A. Transfer of resistance
B. Transfer of current
C. Transfer of power
D. Transfer of voltage

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