Physics FSC Part 2 Chapter 19 Online MCQ's Test

Using relativistic effects the location of an air craft after an hour fight can be predicated about

• 20 m A
• 50 m B
• 760 m C
• 780 m D

A block body is an ideal:

• Absorber A
• Radiator B
• Both a & b C
• None of above D

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.

• 4.5 eV A
• 4.25 eV B
• 4.75 eV C
• 0.25 eV D

De-Broglie waves are associated with

• Moving charged particles only A
• Moving neutral particles only B
• All moving particles C
• All parties whether in motion or at rest D

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

• K.E of al the emited electrons A
• Mean K.E of emited electrons B
• Maximum K.E of emited electrons C
• Minimum K.E of emited electrons D

1 kg mass will be equivalent to energy.

• 9 x 10⁸ J A
• 9 X 10¹² J B
• 9 X 10¹⁶ J C
• 9 X 10¹⁹ J D

When a very high energy modeules such as y radiation interact with matter, the phenomenon arising will be.

• Photoelectric effect A
• Compton effect B
• Pair production C
• Annihilation of matter D

Energy of Black body radiation depends upon

• Nature of surface of body A
• Nature of material of body B
• Shape and size of body C
• Temperature of the body D

An electron miroscope emplys which to one of the following particles?

• Electron ahve a wave nature A
• Electrons can be focused by an electric field B
• Electrons can be focused by a magnetic field C
• All of the above D

In Compton scatting, the value of shift is equal to Compton's wavelength, when X-rays is scattered at the angle of.

• 90^oC A
• Zero B
• 120^oC C
• 45^oC D

• Wien's constant A
• Planck's constant B
• Davison constant C
• Lumber's constant D

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

• Photoelectric effect A
• Compton effect B
• Pair production C
• annihilation of matter D

The materialization of energy take place in the process of.

• Photo electric effect A
• Compton Effect B
• Pair production C
• Annihilationof matter D

A positron is an anti particle of.

• Proton A
• Electron B
• Neutron C
• Photon D

When platinum is it becomes orange at.

• 500^oC A
• 900^oC B
• 1100^oC C
• 1300^oC D

Which is the most refined form of matter.

• Smoke A
• Fog B
• Light C
• Electron D

The unit of work function is

• Electron volt A
• Ampere B
• Volt cell C
• Hz D