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

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

Question # 2

In the experiment of photo electric effect the minimum frequency of photons at which electrons are emitted from a metal surface is called.

Question # 3

X-rays are not used in RADARs because

Question # 4

The radius of second orbit of hydrogen atom is

Question # 5

Which of the following propagates at the same speed as velocity of light.

Question # 6

A deuteron is

Question # 7

Usually in an operational amplifier the inputs used are of

Question # 8

When a platinum wire is heated of 1600 oC, it becomes

Question # 9

The energy of neutrons obtained during a fission reaction is.

Question # 10

When Be is bombarded by alpha particles, then we obtain

Question # 11

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.

Question # 12

The continuous x rays spectrum is obtained due to

Question # 13

The unit generally used for measuring astronomical distances is.

Question # 14

Choose the one which acts as single inverter.

Question # 15

Which of the following detectors can count fast and operate at low voltage.

Question # 16

In a cloud chamber the Alpha particles leave

Question # 17

On which factor cut off wavelength of X-rays coming from a Coolidge tube depends upon.

Question # 18

Current gain of a CE amplifier is 50, ITS hfe is about

Question # 19

When a beta particle travels though a medium it knocks out electrons from the atoms due to.

Question # 20

The energy that must be added to separate the nucleus is called.

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PPSC Physics Chapter 7 Important MCQ's

Sr.# Question Answer
1 The number of electrons in U nucleus are.
A. 92
B. 235
C. zero
D. 143
2 The Beta particles move along.
A. Straight path
B. Curved path
C. Zig Zag path
D. Circular path
3 In fission reaction, heavy water is used as a
A. Coolant
B. Moderator
C. Heat exchanger
D. Controller of reaction rate
4 Emitter follower amplifier is an example of.
A. Current series feedback
B. Voltage series feedback
C. Current shunt feed back
D. Voltage shunt feedback
5 A complete amplifier circuit made on a silicon chip and enclosed in a small capsule is
A. Inductor
B. Metal detector
C. Diode
D. Operational amplifier
6 Bohr's atomic model assumes
A. Nucleus is of infinite mass and is at rest
B. electron in a quantized orbit will not radiate energy
C. Mass of electron remains the same
D. All of the above
7 x-rays cannot produce
A. Photoelectron
B. Compton electron
C. Electron positron pair
D. All of these
8 Transistors with various combinations are widely used as switches in.
A. electric generators
B. Rectificers
C. Amplifiers
D. Computers
9 The particles less in mass than protons are
A. Measons
B. Bosons
C. Baryons
D. Nucleons
10 Induced fission result from the absorption of
A. electron
B. Proton
C. Nucleon
D. Neutron

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