NMIT

In the transistor which region is heavily doped?

• Collector         

• Emitter

• Base

• All regions

How does the refractive index vary in Graded Index fibre?

• Tangentially

• Radially

• Longitudinally

• Transversely

Multimode step index fiber has ___________

• Large core diameter & large numerical aperture

• Large core diameter and small numerical aperture

• Small core diameter and large numerical aperture

• Small core diameter & small numerical aperture

Which of the following are the properties of superconductors?

• They are diamagnetic in nature

• They have zero resistivity

• They have infinite conductivity

• All of the above

Tags

NGSS.HS-PS3-5

The phenomena of super conductors was first discovered by

• Kammerlingh Onnes

• Neils bohr

• Richard Smalley

• Otto lehman

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

The Numerical Aperture depends on

• Material of Core 

• Material of Cladding 

• Outer medium

• All of the above

The core of the optical fiber is having ------------------ refractive index as compared to cladding:

• greater 

• smaller 

• same 

• NOT

Tags

NGSS.HS-PS4-5

Dielectric materials are basically

• Insulators

• semiconductors

• Superconductors          

• Conductors

Tags

NGSS.HS-PS2-6

Newton's rings are produced by

• Interference of light

• refraction of light

• Polarization of light      

• Scattering of light

Tags

NGSS.HS-PS4-5

Which of the following has more distortion

• Single step-index fibre

• Graded index fibre
  
  

• Multimode step-index fibre

• Glass fibre