ISC 12th − Q & A

Proper definitions for the foll pls:
1.Radial field
2.Displacement current
3.Knee Voltage

What are Eddy currents?  And what type of questions they might ask abt Eddy currents?

From youngs double slit experiment ( electron beams r used): 
As the speed of the electron beams are increased,  the fringe width becomes ? Pls give explanation too...

+ 1 more questions by vinayarunkumar  

Do we have to mugg up the all values of wavelengths and frequencies of electromagnetic spectrum? 😦
asked by Vinayarunkumar Kp (vinayarunkumar) 6 years ago
3

1. how does zener diode act as a voltage regulator?
2.working of LED, Photodiode, solar cell (in short ?)
3.definition, properties of cutoff and saturation region
4.do we need to study comm systems in detail? syllabus is a bit vague(but 2 marks rip)
5. how do you remember CE config(only that is in syllabus), i keep forgetting, any tips?
6. are the definitions of susceptibility, and all that trash there?
7. sorry for so many questions im scared

+ 2 more questions by rockstardas  

Ray diagram and derivation of magnifying power of a simple microscope with image at D (least distance of distinct vision) and infinity; Ray diagram and derivation of magnifying power of a compound microscope with image at D. Only expression for magnifying power of compound microscope for final image at infinity. Ray diagrams of refracting telescope with image at infinity as well as at D; simple explanation; derivation of magnifying power; Ray diagram of reflecting telescope with image at infinity. Advantages, disadvantages and uses. Resolving power of compound microscope and telescope. given in syllabus...are you peeps doing all of these?
asked by Anik Das (rockstardas) 6 years ago
2

How to know if a substance is para- or dia- magnetic by keeping it in a magnetic field? I think this ques was in a paper, forgot which one.......
asked by Anik Das (rockstardas) 6 years ago
1

Somebody please clearly explain what's ribbon settlement  :/

+ 1 more questions by indian_butterfly  

Peninsular river without tributaries? Anyone ? :(
asked by Princess Dragunov -_- (indian_butterfly) 6 years ago
1

Is there any way to convert benzaldehyde to benzyl alcohol without using reducing agents?

Any opinions, even if they aren't final answers, will be helpful.

Should we study the Domain theory and stuff... And also Why cant two bulbs be coherent sources

Do we have to study law of malus ??

CHEMISTRY- When to use sp3d2 and d2sp3?
same with sp3d and dsp3?

plz. explain

+ 2 more questions by ktk2911  

what is the name of the constant 'k' used in rate law equation?
asked by Karthik Shivkumar (ktk2911) 6 years ago
1

Hi Guys! I am from a CBSE school, I know that this is an ISC group, but the CBSE Respaper group here is so dead, so can you guys help me out?
asked by Karthik Shivkumar (ktk2911) 6 years ago
1

How do electric and magnetic components of electromagnetic waves change when they enter a medium with refractive index(n) ?

Assume in vacuum electric field = E and magnetic field = B...