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  #2  
12th August 2014, 01:28 PM
Super Moderator
 
Join Date: Apr 2013
Re: CBSE 12th class Physics, Chemistry Maths papers

Here I am giving you question paper for CBSE board of education class 12th science stream examination in PDF file attached with it .

3. State the condition under which a microwave oven heats up a food item containing water molecules most
efficiently. 1
(41)
4. An electrical element X, when connected to an alternating voltage source, has the current through it leading the
voltage by radii. Identify X and write an expression for its reactance. 1

5. A double convex lens, made from a material of refractive index , is immersed is a liquid of refractive index
where . What change, if any, would occur in the nature of the lens? 1

6. The de Broglie wavelengths, associated with a proton and a neutron, are found to be equal. Which of the two has
a higher value for kinetic energy? 1

7. Carbon and silicon are known to have similar lattice structures. However, the four bonding electrons of carbon are
present in second orbit while those of silicon are present in its third orbit. How does this difference result in a
difference in their electrical conductivities? 1

8. An unknown input (A) and the input (B) shown here, are used as the two inputs in a NAND gate. The output Y, has
the form shown below. Identify the intervals over which the input ‘A’ must be ‘low’.
1
9. The two graphs drawn below, show the variation of electrostatic potential (V) with (r being distance of the field
point from the point charge) for two point charges q1 and q2.

The de Broglie wavelengths, associated with a proton and a neutron, are found to be equal. Which of the two has
a higher value for kinetic energy? 1
Carbon and silicon are known to have similar lattice structures. However, the four bonding electrons of carbon are
present in second orbit while those of silicon are present in its third orbit. How does this difference result in a
difference in their electrical conductivities? 1

CBSE class 12th Physics paper




Attached Files
File Type: pdf CBSE class 12th Physics paper.pdf (3.38 MB, 357 views)
  #3  
26th February 2015, 04:12 PM
Unregistered
Guest
 
Re: CBSE 12th class Physics, Chemistry Maths papers

Hi I am preparing for my 12th CBSE board exams so can you please provide me the previous year question paper of Physics, Chemistry and Maths?
  #4  
26th February 2015, 04:37 PM
Super Moderator
 
Join Date: Apr 2013
Re: CBSE 12th class Physics, Chemistry Maths papers

Ok, here I am providing you the question paper of Physics, Chemistry and Maths of 12th CBSE.

12th CBSE Physics, Chemistry and Maths question paper

The duration of the exam is 3 hours.

The maximum mark of the Maths question paper is 100 and 70 of Physics and Chemistry question paper.

All the questions are compulsory.

Here I am attaching a pdf file of question papers.








Contact details

Central Board of Secondary Education
Sector 26, Chandigarh ‎

Map location

[MAP]Central Board of Secondary Education
Sector 26, Chandigarh[/MAP]
Attached Files
File Type: pdf 12th CBSE Physics question paper.pdf (283.6 KB, 148 views)
File Type: pdf 12th CBSE Maths question paper.pdf (226.4 KB, 105 views)
File Type: pdf 12th CBSE chemistry question paper.pdf (222.4 KB, 110 views)


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