Electrical Engineering

Plogrammable logic array is the set of instructions which makes and breaks the circuit.

It's cheaper.

600mV

If you cant find a spec sheet, take out a multi meter, set it to ohm mode and measure the thing. If its a variable find something in the same range, if its fixed you should be able to find a suitable replacement. If its a big resistor make sure you get a power resistor and not a standard ceramic one.

Brush type generators wear out over time of usage and brushes need replaced at a certain intervals too include any damage caused by pitting or scaring.

Brushless generators produce a cleaner voltage sine-wave form verses the brush types.

brushless type generators use an additional VCR (voltage control regulator) circuit that maintains a tight voltage level with less fluctuation it should be mentioned such a circuit increase the chances of generator failure due to component failure.

1. bec the capacitor not allow the current to pass through it after it has charged & it charged in no time ex:(10^-4 second).

2. because it is necessary to avoid wrong polarity by shorting the terminals of the capacitor and tripping the fuse.

When used in car audio applications, a 1 farad capacitor is usually about 6" long and about 2.5-3" in diameter.

• They allow better ventilation

• The pole faces are so shaped that the radial air gap length increases from the pole center to the pole tips so that the flux distribution in the air-gap is sinusoidal in shape which will help the machine to generate sinusoidal emf

• Due to the variable reluctance the machine develops additional reluctance power which is independent of excitation

Electrical Design entails planning, creating, testing or supervising the development and installation of electrical equipment, including lighting design, power systems, power distribution, fire and life safety systems, electronic components and voice and data communications infrastructure.

Typically, an Electrical Design position is held by an electrical engineer who has a bachelor's degree or even a Master of Science in Electrical Engineering. The electrical equipment may be placed in commercial, educational, industrial, hospitality, residential, medical or government facilities.

Low power factor leads to higher current in the system for the same real power requirement. (Check out the power triangle in any basic electical engg. book)

higher current leads to higher system losses for the supply & distribution companies, drop in voltage, also necessiates higher sizing of system components.

Hence low power factor attracts penalty also on the other hand some distribution companies provides incentives for maintaining higher pf.

Regards,

Sameer Shaikh

A vector impedance meter is used to measure impedance and phase angle, this is done by calculating voltage and current through an impedance and then calculating Z and phase angle with that, now there are two modes for operation i.e constant current mode and constant voltage mode.

CONSTANT CURRENT MODE

construction = first of all there is a wien bridge oscillator(w) to choose frequency then an AGC amplifier(a) to regulate current then a z switch control(zs) which regulates gain of AGC amplifer,

feedback to AGC amplifier is done by an dc differential amplifier(dc)

dc

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w--------->a--------->z

now there is an ac differential amplifier too(ac) which gets one input from the z switch and one from the unknown impedance(imp), and there is a transconductance amplifier too which gets one of his input from the unknown impedance

dc<-------------------------------------------

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w--------->a--------->z----------->ac-------------|------------> z meter

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_____| | |

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imp | |

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|________|___>rt___>|

working---> in constant current mode we have to maintain constant current through impedance so current is made to come to unknown impedance from z switch, then that current goes through trans-resistance amplifier, which converts that current to a voltage that is sent to a dc differential amplifier and is compared with a reference voltage in dc differential amplifier then the difference between voltages is amplified and sent to AGC amplifier, so AGC together with z switch this way maintains constant current through unknown impedance,

now for calculation z-magnitude,

ac differential amplifier gets input from unknown impedance and z switch, so difference is amplified and sent to a band pass filter which filters out then the filtered signal is sent to a z-magnitude meter which is calibrated to read z directly.

3/0 awg wire

When reading the needle on an analog meter, you can get a slightly different reading depending on the position of your eye relative to the needle and the scale behind the needle. This is parallax. The digital meter reads the exact value measured (to the accuracy of the meter), and then displays it in the form of "numbers" or "digits" so your eye is not interpreting the value from a scale.

Teaching out of licence is when you are teaching a subject that you do not have your degree in. I.E.: A teacher with a licence in English is teaching a Mathematics class because the position needed to be filled and there are no math teachers availiable.

Source: Foundations of Education, East Carolina University

(a) Charge Will increase

(b) Potential difference will stay the same

(c) Capacitance will increase

(d) Stored energy will decrease

yes you can power some Christmas lights with an eel.

Silicon = 0.7v : Germanium = 0.3v

A: Those voltages are called distribution voltages to differentiate from transmission voltages. And that varies from state to state and locals . Usually around 10kv to 20 kv

On a standard incandescent light bulb, the glass traps a set of gases around the filament that help keep the filament from burning up quickly.

(The filament is the part that does the actual glowing inside the glass.)

It also keeps the oxygen in the air that we breathe away from the filament. Oxygen is one of the gases that will vastly accelerate the destruction of the filament.

(Also, the glass keeps anything from touching the What_is_the_purpose_of_the_glass_on_a_light_bulbconductors inside.)

The glass can also act as a filter to remove any ultraviolet radiation caused by certain types of light bulb's ("lamp's" technically) methods of creating a arc to produce light.

When specially treated, the glass can also be used to break up the light rays to cause more diffused source of light. (Think "Soft White" to get an idea.)

because iron loss is depends on frequency and it is constant through out the operation ...irrespective from load

it will not run

I believe that Vcc stands for Voltage Common Collector. This is because the voltage is hooked up to the collector of the transistor.

what HT Swichgear

MCBs protects electrical circuits against the damage caused due to overload or short circuits