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COMPLETE SOLUTION TO CBSE SAMPLE PAPER FOR 2015
Ans.1.
Ans . 2. Yellow…4
Violet…..7
Ans.3 Capacitor as XC = ωC decreases with increasing frequency.
Ans.4..
Ans.5 Cm(t) is the frequency modulated wave.
SECTION B Ans6.
Ans.7 Ans. Polarisation. Polaroids functioning on polarisation are used (i) in window panes of aeroplanes/AC compartment. (ii) in 3D movies. OR Diffraction. Condition: The size of the obstacle should be comparable to the wavelength of the light incident on it. Applications Holography; 3D motion picture and Diamond ring formation in solar eclipse.
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Ans 8.
Ans 9.
Ans 10. (a) The arrangement in increasing order of the number of computers is LAN; WAN, Internet (b) The minimum number of satellites required is THREE. Ans 11.
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Ans 12.
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Ans13
Ans 14.
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Ans 15.
Ans 16. The given situation can be diagrammatically represented as under:
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Ans 17.
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Ans 18.
Ans 19.
Ans 20.
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Ans. 21.
Ans. 22.
Ans. 23.
Ans. 24.
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Ans 25.
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Ans 26.
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