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CBSE X 2008 - Physics (Power of Lenses) (a) Two lenses have power of (i) +2D (ii) -4D. What is the nature and focal length of each lens? (b) An object is kept at a distance of 100 cm from each of the above lenses. Calculate the (i) image distance (ii) magnification in each of the two cases. CBSE X 2008 | 3 marks |
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CBSE X 2008 - Physics (Question on Current-Time Graphs) You are given following current - time graphs from two different sources. (i) Name the type of current in two cases (ii) Identify any one source for each type of these currents. (iii) What is the frequency of current in case II in India? (iv) Use above graphs to write two differences between the current in two cases. CBSE - X 2008 | 5 marks |
