Harden and toughen the material

Increase carbon content

Restore ductility

Induction harden

Prevents air from entering turbine

Increase flow rate

Convert kinetic energy to pressure energy

Prevent eddies downstream

0.5 seconds

4 seconds

2 seconds

9.8 seconds

12

1

6

2

Low forward and high reverse resistance

Non linear V-I characteristics

Very low forward current till forward voltage reaches cut in voltage

All of the above