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.

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PPSC Physics Chapter 7 Important MCQ's

Sr.#	Question	Answer
1	The wavelength of X-rays is of the ofder of.	A. 10^-14 m B. 10^-10 m C. 10^-9 m D. 10^-6 m
2	The decay to form other nuclides by emitting particles and electromagnetic radiations by unstable nuclides is called.	A. Nuclear stability B. Radioactivity C. Carbon dating D. Spontaneously
3	Isotopes are the atoms of the same elements which contain equal number of.	A. Nucleus B. Neutrons C. Protons D. Electrons
4	The reciprocal of decay constant lamda of a radioactive substances is equal to.	A. total life B. Half life C. Mean life D. Curie
5	Which of the following phenomenon is explained by the tunnel efffect.	A. Alpha decay B. Beta decay C. Gama decay D. Radioactivity
6	In a Geiger Marsden experiment why do the great majority of the Alpha particles pass straight through the metal foil.	A. Atomic nuclei may contain neutrons B. Atoms are electrically neutral C. Atoms are largely empty space D. Atoms have positively charged nuclei
7	In a resistor, when base width decreases with increasing Vbc, this phenomenon is called.	A. Tunneling B. Thermal runway C. Pinch off D. Early effect
8	The minimum amount of energy in an individual electron has to gain to escape from a particular surface is called.	A. Threshold frequency B. work function C. Wave number D. Kinetic energy
9	X-rays travel with	A. The speed of light B. The speed of sound C. The speed of 3,000 m s-1 D. The speed of 3,500 m s-1
10	Which one of the following has the largest wavelength.	A. x rays B. Infrared rays C. Visible light D. Radio waves

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PPSC Physics Topic 7 MCQ Test With Answer

MCQ's Test For PPSC Physics Topic 7 Modern Physics

PPSC Physics Topic 7 Modern Physics

Radio carbon in the atmosphere is produced by the bombardment of.

Alpha particles are

The photons emitted in inner shell transition are.

Critical mass is the minimum mass needed for

Which particle has zero charge and zero rest mass.

Which of the following properties is not exhibited by X-rays.

X-rays used for

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.

The input exultation for a JFET is

In heavy atims the electrons are assumed to be arranged in.

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

Cobalt -60 is a radioactive element with half life of 5.25 years. What fraction of the original sample will be left after 26 years.

In de Brogile model electron orbit must form

The process of pair production will take place if the energy of photon is greater than

An example of continuous spectrum is.

In Compton's effect it was considered that X-rays consist of

The half life of uranium -238 is

Ashes from a campfire deep in a cave show carbon -14 activity of only one eighth the activity of fresh wood. How long ago was that campfire made.

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

In CE amplifier phased reversal occurs when the output voltage is taken between

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Set 15

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Set 17

Set 18

Set 19

Set 20

Set 21

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PPSC Physics Chapter 7 Important MCQ's

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