Board Paper of Class 12-Science 2010 Physics (SET 3) - Solutions
(i) All questions are compulsory.
(ii) There are 30 questions in total. Question Nos. 1 to 8 are very short answer type questions and carry one mark each.
(iii) Question Nos. 9 to 18 carry two marks each, question 19 to 27 carry three marks each and question 28 to 30 carry five marks each.
(iii) There is no overall choice. However, an internal choice has been provided in one question of two marks; one question of three marks and all three questions of five marks each. You have to attempt only one of the choice in such questions.
(iv) Use of calculators is not permitted.
- Question 1
A plot of magnetic flux (Φ) versus current (I) is shown in the figure for two inductors A and Β. Which of the two has larger value of self inductance?
- Question 2
Figure shows three point charges +2q, −q and + 3q. Two charges + 2q and −q are enclosed within a surface ‘S’. What is the electric flux due to this configuration through the surface ‘S’?
- Question 3
In which orientation, a dipole placed in a uniform electric field is in (i) stable, (ii) unstable equilibrium?
VIEW SOLUTION
- Question 4
Which part of electromagnetic spectrum is used in radar systems?
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- Question 5
Calculate the speed of light in a medium whose critical angle is 30°.
VIEW SOLUTION
- Question 6
A glass lens of refractive index 1.45 disappears when immersed in a liquid. What is the value of refractive index of the liquid?
VIEW SOLUTION
- Question 7
Write the expression for Bohr’s radius in hydrogen atom.
VIEW SOLUTION
- Question 8
A wire of resistance 8R is bent in the form of a circle. What is the effective resistance between the ends of a diameter AB?
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