NEETS 7 - Semiconductor Diodes

What are two of the most widely known semiconductors that are in use today?

Which material used in communications was found to be the most stable?

What is a solid whose atoms or molecules are arranged in a three-dimensional geometrical pattern commonly referred to as a lattice called?

What indicates the maximum reverse-bias voltage that may be applied to a diode without causing junction breakdown?

Which substance cannot be reduced to a simpler form by chemical means?

What could be designed to work within the ultra-high frequencies used in radar, whereas the electron tube could not?

Whose initial work led to the development of zener diode which is frequently used today to regulate power supply voltages at precise levels?

What is anything that occupies space and has weight known as?

Which band are electrons never found in, but may travel back and forth through it, provided they do not come to rest in the band?

What is the overall charge of N material?

What is an external voltage applied to a PN junction called?

What is any device that draws current defined as?

What is the maximum reverse DC voltage that will not cause breakdown called?

What is the process by which small amounts of selected additives, called impurities, are added to semiconductors to increase their current flow?

Which type of device operates by virtue of the movement of electrons within a solid piece of semiconductor material?

What is a minute piece of semiconductor material that can produce complete electronic circuit functions?

Which year did Michael Faraday discover that silver sulfide, a semiconductor, has a negative temperature coefficient?

Which year did Munk A. Rosenshold find that certain materials have rectifying properties?

Who invented the photophone?

Which type of material was found to be the most sensitive for use in early radio receivers?

The maximum allowable voltage for a transistor is limited to about 200 volts (but usually how many volts or less)?

The maximum power output for transistor generally ranges from 30 milliwatts to slightly over how many watts?

What is the smallest part of a compound called which has all the characteristics of the compound?

What is a list of all the known elements with the number of electrons in each atom contained?

The chemical activity of an atom is determined by the number of what in its valence shell?

Which two parts is the universe, as we know it today, divided into?

What carries a positive charge of electricity equal and opposite to the charge of the electron?

What is an atom’s ability to combine with other atoms called?

Copper-oxide rectifiers are generally used in small-current applications such as AC meter movements or for delivering direct current to circuits requiring not more than how many amperes?

What is the amount of energy required by an electron to stay in orbit?

What are the three states that matter may be found in?

What is the outer shell of an atom called?

What temperature is the maximum average forward current usually given at?

What is a chemical combination of two or more elements called?

What has a mass approximately equal to that of a proton but has no electrical charge?

The conduction band along with which other band are the two energy bands that an electron can exist in?

Approximately how many times is the mass of the proton to that of an electron?

In simple terms, energy is required in definite units to move electrons from one shell to the next higher shell. What are these units called?

In which process does an atom lose or gain electrons?

Arsenic, antimony, bismuth, and phosphorous are all what type of impurities?

Aluminum, indium, gallium, and boron are all what type of impurities?

Which type of device is obtained when a section of N-type semiconductor material is joined with a similar section of P-type semiconductor material?

What is the electrostatic field called that is created by the positive and negative ions in the depletion region?

What offers very little resistance to current flow in the forward-bias direction but maximum resistance to current flow when reverse biased?

What is the maximum current called that is permitted to flow in the forward direction in the form of nonrecurring pulses?

What is one of the most important uses of a diode?

What is the simplest type of rectifier circuit?

There are many known metal-semiconductor combinations that can be used for contact rectification. Which devices are by far the most popular?

What is the most convenient and quickest way of testing a diode?

What is the smallest particle into which an element can be broken down and still retain all its original properties?