Second Year Physics Chapter 19 Online MCQ Test for 2nd Year Physics Chapter 19 Dawn of Modern Physics Preparation

FSC Part 2 Physics
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Physics FSC Part 2 Chapter 19 Online MCQ's Test

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Question # 1

Max planck received noble prize in:

Question # 2

In the equation if f2 > then

Question # 3

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

Question # 4

The energy of the photon of wavelength 500 nm is.

Question # 5

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

Question # 6

Internal frame is a frame is which

Question # 7

The position has charge which is in magnitude equal to the charge on

Question # 8

The photon with energy greater than 1.02 MeV can interact with matter as.

Question # 9

Platinum wire becomes yellow at a temperature of.

Question # 10

Energy of Black body radiation depends upon

Question # 11

The existence of positron in 1928 was predicted by

Question # 12

The special theory of relativity based on.

Question # 13

1 kg mass will be equivalent to energy.

Question # 14

If the energy of photon is 10 eV and work function is 5 eV, then the a value of stopping potential will be

Question # 15

Photo electrons are emitted y using visible light when the metal is.

Question # 16

Einstein was awarded Nobel prize in physics in

Question # 17

The quantity/factor h/moc has the dimensions of.

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 Platinum wire becomes white at a temperature of.
A. 1600oC
B. 1300oC
C. 1100oC
D. 900oC
2 When platinum wire is heated, it changes to cherry red at temperature.
A. 500oC
B. 900oC
C. 1100oC
D. 1300oC
3 The converses of annihilation of matter is:
A. Photoelectric effect
B. Relativistic effect
C. Pair production
D. Compton effect
4 A positron is an anti particle of.
A. Proton
B. Electron
C. Neutron
D. Photon
5 The physical quantity related to photon, that does not change in Compton scattering is.
A. Energy
B. Speed
C. Frequency
D. Wavelength
6 The unit of Plank's constant 'h' is.
A. JC
B. J/C
C. JS
D. J/S
7 All motions are
A. Absolute
B. Uniform
C. Relative
D. Variable
8 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
9 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.
A. 4.5 eV
B. 4.25 eV
C. 4.75 eV
D. 0.25 eV
10 The dimensions of Plank's constant is same as that of.
A. Energy
B. Power
C. Acceleration
D. Angular momentum

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