Answer the following :
Explain regular and irregular reflection of light with the help of neat diagrams .

Answer the following : Explain the generation of sound in a loudspeaker with the help of neat diagram. Why should there be limit on the loudness of loudspeaker?

Answer the following : Explain the construction and working of a kaleidoscope with the help of a diagram .

Answer the following : Explain the construction and working of a periscope with the help of a diagram .

Answer the following : Explain in detail about the electric bell with the help of a diagram .

Explain Van De Graff generator with the help of neat diagram.

Explain the structure of HIV with the help of a neat labeld diagram.

Answer the following : Explain construction , working and applications of lead-acid cell , with the help of neat diagram .

Answer the following : Classify the below surfaces into forming regular reflection of light and irregular reflection of light : ( surface of the mirror , glazed tiles , soles of shoes , surfaces of tyres , floor of the room when polished , surface of an oily pot , surface of a brick , unpainted wall ).

Explain the Reflex Pathway with the help of a neat labelled diagram.

Explain the digestive system of cockroach with the help of neat labelled diagram?