Directions - Solve the following questions -

1. Fiber optics cable used in communication, works on the principle of
(a) regular reflection of light
(b) diffuse reflection of light
(c) refraction of light
(d) total internal reflection of light

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2. Which among the following standard protocols is the most widely used by the Internet?
(a) HITP
(b) TCP/lP
(c) SMTP
(d) SLIP

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3. The outer skin most of the crustaceans are made up of a carbohydrate. This carbohydrate is
(a) cellulose
(b) galactose
(c) chitin
(d) starch

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4. Rutherford's scattering experiment proved the presence of
(a) atoms in all matter
(b) electrons in atoms
(c) neutrons in atoms
(d) nucleus in atoms

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5. Blood pressure may be increased by the excessive secretion of
(a) Thyroxine
(b) Testosterone
(c) Estradiol
(d) Estral

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