2nd Year Physics Chapter 19 Online MCQ Test for 12th Class Physics Chapter 19 (Dawn of Modern Physics)

ICS Part 2 Physics
Chapter 19 Test

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MCQ's Test For Chapter 0 "Physics ICS Part 2 Chapter 19 Online MCQ's Test"

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Physics ICS Part 2 Chapter 19 Online MCQ's Test

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Question # 1

The wavelength associated with the protons moving at speed of 40 m/s is.

Question # 2

Which one of the following physical quantities change with relativistic speed?

Question # 3

The mass of an object will be doubled at speed.

Question # 4

Platinum wire becomes white at a temperature of.

Question # 5

Pair production cannto take place in vacuum because :

Question # 6

Earth orbital speed is.

Question # 7

The most refined form of matter is:

Question # 8

The existence of positron in 1928 was predicted by

Question # 9

Wave nature of light appears in

Question # 10

Einstein photoelectric equation is

Question # 11

Potassium Cathodes in photocell emit electrons for a light.

Question # 12

In 1905, the special theory of relativity was proposed by

Question # 13

Anti particle of electron is

Question # 14

Light of 4.5 eV is incident on a Cesium surface and stopping potential is 0.25 eV, maximum K.E. of emitted electron is.

Question # 15

Eintein's Photoelectric equation is Ek= hf -∅ in this equation E1, refers to:

Question # 16

A block body is an ideal:

Question # 17

A positron is an anti particle of.

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FSc Part II Class Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 unit of Plank's constant is same as that of.
A. Acceleration
B. Angular momentum
C. Linear momentum
D. Entropy
2 The position has charge which is in magnitude equal to the charge on
A. Electron
B. Proton
C. β particle
D. All
3 A perfect absorber must also be perfect
A. Cavity
B. Sources of radiation
C. Radiator
D. None of these
4 The minimum energy required for occurrence of pair production is:
A. 1.022eV
B. 1.02keV
C. 1.02Me.V
D. 1.04MeV
5 The wavelength associated with the protons moving at speed of 40 m/s is.
A. 7.20 nm
B. 9.02
C. 15.7 nm
D. 17.3 nm
6 A positron is an anti particle of.
A. Proton
B. Electron
C. Neutron
D. Photon
7 The value of Wien's constant:
A. 2.9x10-3mk
B. 2.19x10-7mk
C. 3.18 x106 km-1
D. 6.21 x 10-9m2wk3
8 In the equation if f2 > then
9 The dimensions of Plank's constant is same as that of.
A. Energy
B. Power
C. Acceleration
D. Angular momentum
10 In 1905, the special theory of relativity was proposed by
A. Einstein
B. Bohr
C. Maxwell
D. De Broglie

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