Post by Deleted on Jan 7, 2007 22:41:27 GMT
Any electronics wizards out there ?
Here's a chance to show off your knowledge.
Simple: 1 point for each electronic device that you can identify from the following definitions:
1. An electronic circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a very precise frequency. This frequency is commonly used to keep track of time (as in quartz wristwatches), to provide a stable clock signal for digital integrated circuits, and to stabilize frequencies for radio transmitters.
2. Also known as an electrical insulator, this is a substance that is highly resistant to electric current. Although a vacuum is also an excellent example of one, the following discussion applies primarily to physical substances.
It tends to concentrate an applied electric field (e-field) within itself. As it interacts with the applied electric field, charges are redistributed within its atoms or molecules. This redistribution alters the shape of the applied electrical field both inside and in the region near its material.When one is placed between two electric charges it decreases the effective force between them and, when an electromagnetic wave travels through one, the
velocity of the wave will be reduced and it will behave as if it had a shorter wavelength.
3.A semiconductor device that uses a small amount of voltage or electrical current to control a larger change in voltage or current. It is the fundamental building block of the circuitry that governs the operation of computers, cellular phones, and all other modern electronics.Because of its fast response and accuracy, it may be used in a wide variety of digital and analog functions, including amplification, switching, voltage regulation, signal modulation, and oscillators. They may be packaged individually or as part of an integrated circuit chip, which may hold thousands of them in a very small area.
4.An electrical device that can store energy in the electric field between a pair of closely spaced conductors (called 'plates'). When voltage is applied to it, electric charges of equalmagnitude, but opposite polarity, build up on each plate.They are used in electrical circuits as energy-storage devices. They can also be used to differentiate between high-frequency and low-frequency signals and this makes them useful in electronic filters.
5.In electronics, a component that restricts the direction of movement of charge carriers. Essentially, it allows an electric current to flow in one direction, but blocks it in the opposite direction. Thus, it can be thought of as an electronic version of a check valve. Circuits that require current flow in only one direction will typically include one or more in the circuit design.Early versions included "cat's whisker" crystals and thermionic valves devices (also known as vacuum tubes). Today the most common ones are made from semiconductor materials such as silicon or germanium.
6.Simply, any device that regulates the flow of substances (either gases, fluidized solids, slurries, or liquids) by opening, closing, or partially obstructing various passageways.
7.A solid-state semiconductor device with four layers of alternating N and P-type material. They act as a switch, conducting when their gate receives a current pulse, and continue to conduct for as long as they are forward biased.
8.An electrical device that transfers energy from one circuit to another by magnetic coupling with no moving parts. It comprises two or more coupled windings, or a single tapped winding and, in most cases, a magnetic core to concentrate magnetic flux. A changing current in one winding creates a time-varying magnetic flux in the core, which induces a voltage in the other windings
9.An electronic device that reduces the amplitude or power of a signal without appreciably distorting its waveform. They are usually passive devices made from resistors. The degree of effectivity may be fixed, continuously adjustable, or incrementally adjustable.
10.Generally, any device that uses a small amount of energy to control a larger amount of energy. In popular use, the term today usually refers to the electronic type, often as in audio applications. The relationship of the input to the output — usually expressed as a function of the input frequency — is called the transfer function, and the magnitude of the transfer function is termed the gain.
Good luck, you may need it !!! ;D ;) 8-)
Here's a chance to show off your knowledge.
Simple: 1 point for each electronic device that you can identify from the following definitions:
1. An electronic circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a very precise frequency. This frequency is commonly used to keep track of time (as in quartz wristwatches), to provide a stable clock signal for digital integrated circuits, and to stabilize frequencies for radio transmitters.
2. Also known as an electrical insulator, this is a substance that is highly resistant to electric current. Although a vacuum is also an excellent example of one, the following discussion applies primarily to physical substances.
It tends to concentrate an applied electric field (e-field) within itself. As it interacts with the applied electric field, charges are redistributed within its atoms or molecules. This redistribution alters the shape of the applied electrical field both inside and in the region near its material.When one is placed between two electric charges it decreases the effective force between them and, when an electromagnetic wave travels through one, the
velocity of the wave will be reduced and it will behave as if it had a shorter wavelength.
3.A semiconductor device that uses a small amount of voltage or electrical current to control a larger change in voltage or current. It is the fundamental building block of the circuitry that governs the operation of computers, cellular phones, and all other modern electronics.Because of its fast response and accuracy, it may be used in a wide variety of digital and analog functions, including amplification, switching, voltage regulation, signal modulation, and oscillators. They may be packaged individually or as part of an integrated circuit chip, which may hold thousands of them in a very small area.
4.An electrical device that can store energy in the electric field between a pair of closely spaced conductors (called 'plates'). When voltage is applied to it, electric charges of equalmagnitude, but opposite polarity, build up on each plate.They are used in electrical circuits as energy-storage devices. They can also be used to differentiate between high-frequency and low-frequency signals and this makes them useful in electronic filters.
5.In electronics, a component that restricts the direction of movement of charge carriers. Essentially, it allows an electric current to flow in one direction, but blocks it in the opposite direction. Thus, it can be thought of as an electronic version of a check valve. Circuits that require current flow in only one direction will typically include one or more in the circuit design.Early versions included "cat's whisker" crystals and thermionic valves devices (also known as vacuum tubes). Today the most common ones are made from semiconductor materials such as silicon or germanium.
6.Simply, any device that regulates the flow of substances (either gases, fluidized solids, slurries, or liquids) by opening, closing, or partially obstructing various passageways.
7.A solid-state semiconductor device with four layers of alternating N and P-type material. They act as a switch, conducting when their gate receives a current pulse, and continue to conduct for as long as they are forward biased.
8.An electrical device that transfers energy from one circuit to another by magnetic coupling with no moving parts. It comprises two or more coupled windings, or a single tapped winding and, in most cases, a magnetic core to concentrate magnetic flux. A changing current in one winding creates a time-varying magnetic flux in the core, which induces a voltage in the other windings
9.An electronic device that reduces the amplitude or power of a signal without appreciably distorting its waveform. They are usually passive devices made from resistors. The degree of effectivity may be fixed, continuously adjustable, or incrementally adjustable.
10.Generally, any device that uses a small amount of energy to control a larger amount of energy. In popular use, the term today usually refers to the electronic type, often as in audio applications. The relationship of the input to the output — usually expressed as a function of the input frequency — is called the transfer function, and the magnitude of the transfer function is termed the gain.
Good luck, you may need it !!! ;D ;) 8-)
