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

Alpha particles are used for the treatment of skin of a patient due to.

Question # 2

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

Question # 3

Why hydrogen atom does not emit x-rays.

Question # 4

Mass -energy relation means that the product of mass times the square of the speed of light must be equal to.

Question # 5

How many types of quarks were suggested i 1964 quark theory.

Question # 6

Which of the following can be used as an arrester in a nuclear reactor.

Question # 7

Which of the following is required for maintaining sustained chain reaction.

Question # 8

At what speed the mass of a body will be doubled.

Question # 9

The SI unit of decay constant is.

Question # 10

In a Geiger Marsden experiment why do the great majority of the Alpha particles pass straight through the metal foil.

Question # 11

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

Question # 12

A photon is chasing an electron, whose speed is 0.9 c What is their relative speed.

Question # 13

What is the effect of electric and magnetic fields on X-rays

Question # 14

Base current of a transistor is 1 mA and collector current is 99 mA What is emitter current.

Question # 15

What will be excitation energy in the third orbit of hydrogen atom.

Question # 16

Which particle has zero charge and zero rest mass.

Question # 17

Which of the following is believed to be carrier o nuclear forces.

Question # 18

A factory buy 100 g of a radioactive chemical with a half life of 5 years which decays to a stable compound How much of the chemical will still be radioactive 10 years time.

Question # 19

The radius of second orbit of hydrogen atom is

Question # 20

The process of energy generation in sun and stars is.

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 In a nuclear reactor chani reaction is controlled by introducing.
A. Iron rods
B. Cadmium rods
C. Graphite rods
D. Platinum rods
2 In the Geiger Marsden experiment a narrow beam of alpha particles was fired at a thin piece of Gold foil in a vacuum Some of the particles were scattered though large angles The result of the experiment provided evidence for the existence of.
A. A very small charged nucleus
B. electrons orbiting the nucleus
C. Neutrons in the nucleus
D. Nuclear reaction
3 When of the following radiations are not emitted by electron transitions in atoms.
A. Visible rays
B. Ultraviolet rays
C. Infrared radiations
D. Alpha particles
4 The transition of inner shell electrons in heavy atoms gives rise to the emission of.
A. Low energy b-particle
B. High energy b-particle
C. High energy X- rays
D. High energy gama rays
5 Which of the following is required for maintaining sustained chain reaction.
A. Neutrons
B. Protons
C. Electrons
D. Photons
6 The binding energy per nucleon for uranium is about.
A. 7.7 MeV
B. 9.6 MeV
C. 13.6 MeV
D. 21.6 MeV
7 Negative feedback
A. Increases stability
B. Decreases stability
C. Produces oscillatory
D. Cannot occur
8 When using the formula E = h lambda what unit should energy have.
A. Joule
B. Watt second
C. Newton metre
D. Electron volt
9 As the mass number increases, the binding energy per nucleon in a nucleus
A. Increases
B. Decreases
C. Remain constant
D. Varies in a way that depends upon A
10 Which of the following radiations can penetrate 20 cm thick steel.
A. Alpha particles
B. Beta particles
C. Gama particles
D. Neutrons

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