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

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PPSC Physics Topic 7 Modern Physics

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Question # 1

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

Question # 2

The Beta particles move along.

Question # 3

The half life of radium -226 is

Question # 4

Which of the following is not a mode of radioactive decay

Question # 5

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

Question # 6

A CE amplifier with by passed emitter resistor is an example of.

Question # 7

Critical mass is the minimum mass needed for

Question # 8

The relationship between mass number atomic number and neutron number is.

Question # 9

The binary equivalent of 25 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

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 # 12

Which of the following is not an electromagnetic wave.

Question # 13

If an object moves with velocity of light the apparent length of the object moving the direction of motion becomes.

Question # 14

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

Question # 15

The total number nucleons in a nucleus are called.

Question # 16

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

Question # 17

Cs - 137 is a radioisotope used ot determine the thickness of the walls of steel pipes Cs 137 is chosen because it emits

Question # 18

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

Question # 19

X-rays are also used for

Question # 20

An example of continuous spectrum is.

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 the alpha particle does not travel for enough in air.
A. Due to its intense ionization
B. Due to its large mass
C. Due to its high charge
D. Due to its Hight Ionization
2 Particle which can be added to the nucleus of an atom with changing its chemical properties are called.
A. Electrons
B. Protons
C. Neutrons
D. Alpha particles
3 The neutral atoms of all isotopes of the same element contain the same numbers of.
A. Electrons and protons
B. Electrons and neutrons
C. Neutrons
D. Neutrons and protons
4 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
5 In CC configuration voltage gain is.
A. Less than one
B. More than one
C. One
D. Zero
6 The radius of first Bohr's orbit for hydrogen atom is.
A. 0.53 m
B. 0.53 nm
C. 0.053 nm
D. 0.53 mm
7 Magnetic field does not cause deflection in
A. Alpha particle
B. Beta minus particles
C. Beta plus particles
D. Gama rays
8 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.
A. 25 g
B. 50 g
C. 75 g
D. 100 g
9 Mosley's law establishes the x rays fluorescence's of target element with its.
A. Atomic weight
B. Atomic number
C. Density
D. Lattice constant
10 The phenomenon in which a photon of frequency 'f' is scattered by an electron and the scattered photon has frequency f <f is known as.
A. Pair production
B. Pair annihilations
C. Photoelectric effect
D. Compton's effect

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