Electronics Engineering

It all depends on the machine PSU(Power Supply Unit), usually 80v-150v or as I have constructed before a 20v computer so it's the same as saying 'How long is a piece of string?'-

The Computer power supply takes in the 120-240 volts coming from the A/C outlet and reduces it to 18 volts D.C. to run the System board and peripheral's in the case, i.e. DVD ROM, CD ROM, HDD, Graphics card and CPU fan. Your monitor as well runs on 18 V.D.C. which is again reduced from the 120 - 240 volts A.C. through the power block, (transformer).

Zero crossing is commonly used in mathematics and electronics. Its when the mathematical function changes represented by crossing at an axis.

Actually electrical engineering comprises all the subjects basics like electronic,

management, mechanical,computer based subjects through this we can learn all the subjects basics clearly and it is more useful for higher education. the very main advantage of picking electrical engineering is we can able to study any subjects related to research or industrial oriented or business oriented etc.., in our PG. electrical engineering subject is also one of the toughest one in engg stream, if we pick electronic engg we go only by communication or electronic side so my answer is electrical has the upper hand than the electronic engg

* basic physics -- a voltage applied across a junction or an insulator will produce some current, no matter how small. No perfect insulator exists in electronics.

* defects in manufacturers -- undesirable elements in a junction or an insulator, introduced during manufacturing and stay, will affect the normal current-voltage behavior

* unintended usage -- the voltage or current applied to an electronic component has gone beyond its spec

* damage -- the electronic component has suffered permanent damage due to excessive usage, abuse, or electrostatic discharge.

It is a college where many usually MOST people don't live on dorms at the college but rather live with their parents and drive to school every day.

Most likely made by a robot machine. IE: more better it is maybe 30 feet of small copper or aluminum tubing wound in a back and forth coil pattern to fit the required area in the freezer. Metal fins may be attached to help move the cold into the freezer as air is blown over the coil.

voltage drop is zero bcz in open ckt current will be zero

A conductor is that one which allows the flow of electric current through it. An inductor is also a conductor but in the form of a coil used in varying current circuits. An inductor's role is not to conduct electricity; it is used in alternating current circuits and control it without much power loss. it is based on self induction.

pass AC voltages.

In a photo-diode when light is incident, the fractional increase in the majority carriers is much less than the fractional increase in the minority carriers. Consequently, the fractional change due to the photo-effects on the minority carrier dominated reverse bias current is more easily measurable than the fractional change due to the photo-effects on the majority carrier dominated forward bias current. Hence, photo-diodes are preferred to be used in the reverse bias condition to easily observe the variation of current with intensity.

Yes. As long as the speaker impedance is higher than the minimum rating for the amplifier, you are OK.

A room noise detector could serve as a burglar alarm during the night and when away from home, of course, if no noisy dogs or other pets. It could serve as a child protection device, near a door to the outside of the home or near a swimming pool gate to alert the adults of he child's presence near the pool, or a road with traffic.

.7v less than unity for DC operation but unity for AC.

Anything that uses electricity. For example, a light-bulb.

Yes it is. Most Sn (tin) materials as semiconductors are direct band gap materials. Silicon on the other hand is an indirect band gap material.

The secondary current is determined by the load, not by the transformer. For example, if the secondary voltage is 50 V and the load is 100 ohms, then the secondary current will be 0.5 A. If the load is 25 ohms, then the secondary current will be 2 A. It is important that a continuous secondary current doesn't exceed the rated secondary current of the transformer.

because charge carriers are depleted there, some electrons from n side have fallen into holes on p side reducing/depleting carriers on both sides.

50 ohms...!

A multimeter is used to measure various parameters in an electrical circuit. It can be used to measure things like voltage, current, resistance, frequency, and more depending on the how advanced the meter is.

The digital aspect of the meter is easier to explain with respect to an analog meter. The old analog meters used built in analog circuits to detect the above parameters and display the measurement by moving a mechanical needle a certain distance based on the magnitude of the measurement. This distance could be correlated with the magnitude using formulae and a scale was printed on the face of the meter so you could tell what value the needle was pointing at.

Digital meters, however, take the analog signals and convert them to digital signals. These digital signals represent binary information that a micro-processor can read. The processor can be programmed to interpret the incoming data and then display in on the screen.

by noticing the polarity of theohmmeter a diode can be checked for continuity and blocking ability However it will not tell you how good or bad the device itself is

BY keeping the multimeter in diode mode and keeping properly the positive and negative terminals of the multimeter. If the diode is good multimeter will show a reading of 0.5 else there will be a short.

Because that is what a capacitor does, resist a change in voltage. It holds a certain amount of energy per charge (voltage), and to change that voltage requires current proportionally to the capacitance.

Simply put, the purpose of a resistor is to 'resist' the flow of current. Ohm's Law tells us that for a given voltage, the larger the resistance, or value of that resistor, the lower the current that will flow. Ohm's Law states that I (current) = E (voltage) / R (resistance)

- where current is measured in amps, voltage is measured in volts and resistance is measured in ohms.

Three things that are needed to have an operating electrical circuit are:

1. Electric potential difference or voltage.

2. Conductive path, which allows the movement of charges such as wire.

3. Resistor, which acts as an electrical resistance and loosely defines any object that uses electricity to do work.

In semiconductor uses, such as diodes and transistors, the forward voltage drop for Silicon (Si) is a little less than 0.7 volts, while the FVD for Germanium (Ge) is about 0.3 volts.

An electrical circuit is an example of an electrical pressure to electrical current convertor.