To produce modulation

To produce demodulation

To produce oscillation

To produce multiplexion

Increases the cut - in - voltage

Barrier width of junction increases

Junction ruptured and short circuited

No current flows through the junction

0.2 V

0.3 V

0.7 V

1.4 V

To minimize the gain

To get less distortion

To get more voltage gain

To eleminate the transformer

By circuit testing

By ohm meter testing

By physical testing

By voltage measurements