Materials Science Questions

True or False Dislocations are visible in electron micrographs

True or False Every lattice site is a potential vacancy site

Bonds across/between the atoms of the slipping planes are _____ and _____ in succession

Most metals are _____ - Impurity atoms deliberately added to modify properties

Low angle grain boundary is an array of aligned ______

True or False There is no such a thing as a pure metal

imperfections and defects are often responsible for observed _____ of materials and we sometimes deliberately tailor _____ routes to introduce certain types of defects in materials

one kind of point defect is _______ which are empty atomic sites in the crystal structure

real materials contain large numbers of various _____ and _____.

The study of the behavior of electrons in a vacuum or in special materials is called_________.

The production of electric current in a vacuum using a heated cathode is __________ emission.

The positive electrode of a vacuum tube is the ________.

Cathode rays are actually stream of ________.

A single piece of semiconductor containing an entire electronic circuit is an ___________.

A semiconductor device that can act as a switch and amplify weak signals is a ____________.

A material that is neither a good conductor nor a good insulator is a

The Crookes tube is an example of an _________ tube.

A simple vacuum tube consisting of two electrodes that allow current to flow in only one direction is called a ___________.

The separation of charges by light is called the __________ Effect.

elements combined to form crystalline lattices