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CBSE X 2008 - Physics (In which is the Speed of Light Maximum) Refractive Index of the media A, B, C, D are given. In which of the four media is the speed of light (i) maximum (ii) minimum? CBSE X 2008 | 1 mark |
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CBSE X 2008 - Physics (Questions on Electricity Bill of Elecrtical Appliances Used) A household uses the following electric appliances. (i) refrigerator of rating 400 W for 10 hours each day. (ii) two electric fans of rating 80 W each for 12 hours each day. (iii) six electric tubes of rating 18 W each for 6 hours each day. Calculate the electricity bill of the household for the month of June if the cost per unit of electric energy is Rs. 3.00. CBSE X 2008 | 1 mark |
