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CBSE X 2008 - Physics (What is Strength of Magnetic Field) How is the strength of the magnetic field at a point near a wire related to the strength of the electric current flowing in the wire? CBSE X 2008 | 1 mark |
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CBSE X 2008 - Physics (What Is The Colour Of Sky) Give reasons: (i) The sky appears to be blue during day time to a person on earth. (ii) The sky near the horizon appears to have a reddish hue at the time of sunset and sunrise. (iii) The sky appears dark instead of blue to an astronaut. (iv) The stars appear to twinkle. (v) The planets do not twinkle. CBSE X 2008 | 5 marks |
