electricity — Science STD 10 — Question

What is gustatory receptors? Where they located?

Define term : Saturated carbon compounds

What is reflection of light? Give the types of reflection.

A concave lens produces an image at 20 cm from the lens of an object placed at 30 cm from the lens. Find the focal length of the lens.

How a food vacuole is formed in amoeba?

Four friends went to a picnic. The weather was pleasant. They played various games and then had snacks. Suddenly. Raju, one of them, observed seven colours in the sky. He said to others. "wow what a rainbow"!
Ram, one of them, asked him "What is a rainbow?" Raju then explained to all about its formation.
After that everyone in the group thanked Raju for the knowledge, he had given to them. (1) When Raju was facing the rainbow, where was the Sun?
(2) Which device can be used to obtain such a phenomenon?
(3) What moral value do you learn from Raju?

For which colour has the glass larger refractive index-violet or green?

How does the resistance of a metallic wire depend on its temperature?

The optician's prescription for a pair of spectacles is:
Right eye :- 3.50 D, Left eye: -4.00 D
(a) Are these lenses thinner at the middle or at the edges?
(b) Which is the weaker eye?