NCERT Exemplar I — task. Science CBSE, Class 9.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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1. The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to

\(\pi\ r\)
\(2\ r\)
\(Zero\)
\(2\ \pi\ r\)

2. A body is thrown vertically upward with velocity u, the greatest height h to which it will rise is,

\(\frac{u^2}{g}\)
\(\frac{u}{2g}\)
\(\frac{u^2}{2g}\)
\(\frac{u}{g}\)

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