Engineering Materials

Class 1 capacitors have dielectric constants are up to ____

What are the typical dielectric constants of class II capacitors?

What are the most widely used general-purpose coatings?

What is widely used in the electronic industry as a structural member, such as tube envelopes, hermetic seals to metals or ceramics, protective caring on hybrid and integrated circuits, etc?

What refers to glasses which are devitrified about \( 100^\circ C \) below their softening point to form a very fine network of crystalline phase?

The percentage change in magnetic properties of materials resulting from temperature aging is called the _______

The change in electrical resistance due to the application of magnetic field is called ________

Which material is used for dc application such as electromagnetic cores and relays?

Which of the ff is known as "electrical steel"?

What is the highest frequency ferrite?

Which material is used for Schottky barrier diodes, LED, Gunn diodes and injection lasers?

What material is used for electroluminescent diodes which can emit either green or red light?

Lead compounds such as lead sulfide, selenide, and telluride may be used for which application?

For hardness penetration test, the Rockwell test uses what type of penetrator?

What is the combination of cutting and scratch test of a material?

What refers to the strain energy per unit volume required to reach the yield point?

The ff are typical properties of ceramics except:

What refers to the average number of mers in the molecule, typically several hundred to several thousand?

What nickel alloy has high electrical and corrosion resistance and high strength at red heat temperature and contain 15 to 20 % chromium?

Silicon bronze contains how many percent of silicon?