Draw a labelled ray diagram of a reflecting type telescope. Write its any one advantage over refracting type telescope.

Draw a labelled diagtram of a box type solar cooker,also give its working and advantages

Draw a labelled diagram of mitochondrion. Write its function.

What is a fuel cell? Write its one advantage over other ordinary cells.

Draw a labelled ray diagram to show the image formation in a refracting type astronomical telescope .Why should the diameter of teh objetive of a telescope large?

Describe a reflecting telescope. Give its merits and demerits.

Draw a neat labeled ray diagram for a simple astronomical telescope using a reflector.

Draw a neatly labelled diagram of a potentionmeter and explain its principle.