Board Paper of Class 12-Science 2013 Physics Delhi(SET 3) - Solutions
(i) All questions are compulsory.
(ii) There are 29 questions in total. Question Nos. 1 to 8 are very short answer type questions and carry one mark each.
(iii) Questions Nos. 9 to 16 carry two marks each. Questions Nos. 17 to 25 carry three marks each and questions Nos. 27 to 29 carry five marks each.
(iv) 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 choices in such questions.
(v) Questions No. 26 is value based question carries four marks.
(vi) Use of calculators is not permitted. However, you may use log tables if necessary.
- Question 1
What is the geometrical shape of equipotential surfaces due to a single isolated charge?
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- Question 2
Write the relationship between angle of incidence ‘i’, angle of prism ‘A’ and angle of minimum deviations for a triangular prism.
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- Question 3
A capacitor has been charged by a dc source. What are the magnitude of conduction and displacement current, when it is fully charged?
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- Question 4
The given graph shows the variation of photo-electric current (I) versus applied voltage (V) for two difference photosensitive materials and for two different intensities of the incident radiations. Identify the pairs of curves that correspond to different materials but same intensity of incident radiation.
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- Question 5
Which of the following waves can be polarized (i) Heat waves (ii) Sound waves? Give reason to support your answer.
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- Question 6
A 5 V battery of negligible internal resistance is connected across a 200 V battery and a resistance of 39Ω as shown in the figure. Find the value of the current in circuit.
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- Question 7
- Question 8
A heating element is marked 210 V, 630 W. Find the resistance of the element when connected to a 210 V dc source.
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