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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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OR

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Ans 25.

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Ans 26.

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OR

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