PPSC Physics Topic 7 MCQ Test With Answer

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

Atomic reactor is based on

Controlled chain reaction A
Uncontrolledly chain reaction B
Nuclear fission C
Nuclear fusion D

Question # 2

The input resistance of a JFET is of the order of.

1 M Mega A
10 M Mega B
100 M Mega C
1,000 M Mega D

Question # 3

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

0.21 MeV A
0.51 MeV B
1.51 MeV C
1.21 MeV D

Question # 4

The potential due to which an electron is lifted from gerund state to excited state is.

Potential gradient A
excitation potential B
Ionization potential C
Potential difference D

Question # 5

the gain of an amplifier is independent of

The two externally connected resistances A
What is happening inside the amplifier B
Internal structure of the amplifier C
All of the above D

Question # 6

The energy in an electromagnetic wave is carried in the units called.

Protons A
Electrons B
Neutrons C
Nucleus D

Question # 7

Two electrons approach each other their relative velocity will be.

Zero A
c B
c/2 C
Infinity D

Question # 8

When an object moves with a very high speed the length in the direction of motion.

Contracts A
Expands B
Remains the same C
Becomes infinity D

Question # 9

The transition of inner shell electrons in heavy atoms gives rise to the emission of.

Low energy b-particle A
High energy b-particle B
High energy X- rays
C
High energy gama rays D

Question # 10

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

Highly ionizing power A
Low penetration power B
Positively charged particles C
Helium nucler D

Question # 11

The chain reaction is controlled by a series of rods usually made of.

uranium A
Cadimium B
Boron C
Steel D

Question # 12

The electrons behave as wave because.

They can be diffracted by a crystal A
They can be defecting by magnetic field B
They can be deflecting by electric field C
they can produce ions in gases D

Question # 13

In a nuclear reactor chani reaction is controlled by introducing.

Iron rods A
Cadmium rods B
Graphite rods C
Platinum rods D

Question # 14

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

G.M Counter A
Cloud chamber B
Solid state detector C
Bubble chamber D

Question # 15

Which of the following is the most commonly used regions of operations for a transistor.

Cut off A
Saturation B
Active C
All of these D

Question # 16

A slow neutron can cause fission in

Uranium -238 A
Uranium-235 B
Hydrogen-1 C
Thorium -232 D

Question # 17

The maximum K.E. with which photoelectrons are emitted depends very strongly on the.

Intensity of incident light A
Electric field near the photocathode B
Frequency of incident light C
Polarization of incident light D

Question # 18

Particle which can be added to the nucleus of an atom with changing its chemical properties are called.

Electrons A
Protons B
Neutrons C
Alpha particles D

Question # 19

In n-p-n transistor the current flows in the direction from

Emitter to base A
emitter to collector B
Base to emitter C
Base to collector D

Question # 20

The change in wavelength of an X-ray when scattered from an electron is called.

Compton shift A
Doppler shift B
Stefan's law C
Fraunhofer lines D

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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

Atomic reactor is based on

The input resistance of a JFET is of the order of.

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

The potential due to which an electron is lifted from gerund state to excited state is.

the gain of an amplifier is independent of

The energy in an electromagnetic wave is carried in the units called.

Two electrons approach each other their relative velocity will be.

When an object moves with a very high speed the length in the direction of motion.

The transition of inner shell electrons in heavy atoms gives rise to the emission of.

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

The chain reaction is controlled by a series of rods usually made of.

The electrons behave as wave because.

In a nuclear reactor chani reaction is controlled by introducing.

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

Which of the following is the most commonly used regions of operations for a transistor.

A slow neutron can cause fission in

The maximum K.E. with which photoelectrons are emitted depends very strongly on the.

Particle which can be added to the nucleus of an atom with changing its chemical properties are called.

In n-p-n transistor the current flows in the direction from

The change in wavelength of an X-ray when scattered from an electron is called.

Prepare Complete Set Wise PPSC Physics Topic 7 Modern Physics MCQs Online With Answers

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