Mention two important uses of heavy water.

Draw diagrams to show how a p-n junction is forward biased Draw V-I characteristics of the diode in both conditions and show in it break down voltage. Mention one important use of Zener diode.

What are x-rays? State two important uses of it.

Mention the most important or characteristic property of cell membrane.

Mention two important characteristics of solid.

Mention the two important characteristics of unicellular organisms.