Question

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Answer 1

Answer:

5. The two phenomena involved in the formation of rainbow are internal reflection, refraction and dispersion.

6. b). if we place two converging lenses d cm apart, and a=f1 + f2, here f1 and f2 are focal length of the both lens then parallel beam of light become parallel after passing through two lenses.

8. According to the Fleming's left hand rule, the direction of a force is perpendicular to the direction of magnetic field and current. Here, since the direction of current is taken opposite to the direction of motion of electrons, the force is directed into the page.

9. b). Q=It = 0.5A × (10×60)s = 300C

hence, the amount of electric charge flowing through the circuit is 300C.

Answer 2

Answer:

Ascending order:-

6, 8, 7, 10, 12, 14, 14, 14, 14, 18, 18, 18, 20, 20, 22, 26, 26, 38