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Electrical Engineering

Electrical engineering is a field of engineering that deals with the study and application of electricity, electronics and electromagnetism.

23,056 Questions

What is run capacitor in single phase motor starter with three wire?

A run capacitor and a starter capacitor are not the same thing. A run capacitor is energized the entire time the motor is running, and a start capacitor is not.

A run capacitor is one that changes the current on the windings of a single phase AC induction motor to create a rotating magnetic field to energize a second-phase winding.

A start capacitor increases starting torque, allowing a motor to be turned on rapidly. It stays in the circuit only long enough to bring the motor to 3/4 of full speed. Some motors then continue to run with a run capacitor.

Is base emitter circuit and common base amplifier same?

No the base emitter circuit is not the same as a common base circuit. The three BJT circuits all have the base emitter circuit. Wheter each terminal is common to both inputs and outputs of the circuit determines the type of transistor configuration.Henry Lee Everson PE;229-560-9769

What is role of electronics and communication in power plants?

All power company rely heavily on electronics to monitor hi power flow. plants output on a distribution level electronics are used to open-close breakers. up to the minute reliable communication is essential a loss of 100 costumers means a loss of bigrevenue's Some company rely on modems and their own telephones lines others use satellites. Converting a state California to new communication without interruption is a concern

The voltage drop in each resistance is?

V=IR by ohms law.

Voltage across the resistor is the product of current flowing and resistance of the conductor at constant temperature.

An electric heater takes 8 A from a 240 V supply Find the annual cost if the heater is used an average of 25 hours per week for 48 weeks Assume that 1 kWh of energy costs 5 cents?

Hours of usage per year: 25 hours per week x 48 weeks = 1200 hours

kW per hour: (Amps x volts = Watts) 8 Amps x 240 volts = 1920 Watts per hour (1.92 kW)

1200 hours x 1.92 kW = 2304 kWh

2304 kWh x .05 = $115.20

What is the meaning of vito power?

if you mean veto then it means it was opposed or turned down by more powerful judgment

What type of maintenance in dry type transformer?

Yearly maintenance should include blowing out dust and then vacuuming up the dust. While the transformer is down all the bolts and terminations should be checked for tightness. Make sure that the vents in the case are not blocked by foreign objects that happen to be in the same room as the transformer.

Can the tripping due to inrush current be suppressed by either decreasing the sensitivity.What are the drawbacks involved?

The only breakers that allow any adjustment at all are usually three phase and used on motor starting. These types of breakers have overload rated trips installed into them. The breaker has to be sized by code to 250% of the motors full load amperage. The adjustment is in the time that the breaker will hold the 250% overload before tripping. The draw back is that the longer the time for the motor to start, the quicker the motor will heat up. It is the prolonged heat that finally destroys the insulation on the motor's winding and will finally lead to a shorting of the windings to ground or to themselves.

What are the differences between ac servomotor and dc servomotors?

AC servomotors require an alternating current as a power source, meaning they need to be plugged into an outlet, while DC servomotors require a direct current as a power source, meaning they can be run off of battery power.

How much electrical resistance does a big city have?

The resistance is simply the value of resistances of all electrical equipment connected in Parallel by all consumers in a big city.

The answer is amazingly accurate, if we have the average power consumption (Megawatts-MW) figure from the power company at any time of the day.

Suppose a big city is consuming 100-MW at a given time. Assuming we use 100 volts AC at consumer homes, then at any given moment the instantaneous resistance (R in ohms) of the city is simply given by the formula:

Power(watts) = (Volts x Volts) / Resistance (R in ohms)..........or,

P=V2/ R, therefore,

R = V2/P (ohms)......... then,

If:

V=100 volts (ac)

P= 100,000,000 watts

Then:

R = 100 x 100 / 100,000,000 = 0.0001 (ohms)

(make sure to use only watts, volts and ohms in the formula above).

Good Luck !

The resistance is simply the value of resistances of all electrical equipment connected in Parallel by all consumers in a big city.

The answer is amazingly accurate, if we have the average power consumption (Megawatts-MW) figure from the power company at any time of the day.

Suppose a big city is consuming 100-MW at a given time. Assuming we use 100 volts AC at consumer homes, then at any given moment the instantaneous resistance (R in ohms) of the city is simply given by the formula:

Power(watts) = (Volts x Volts) / Resistance (R in ohms)..........or,

P=V2/ R, therefore,

R = V2/P (ohms)......... then,

If:

V=100 volts (ac)

P= 100,000,000 watts

Then:

R = 100 x 100 / 100,000,000 = 0.0001 (ohms)

(make sure to use only watts, volts and ohms in the formula above).

Good Luck !

The resistance is simply the value of resistances of all electrical equipment connected in Parallel by all consumers in a big city.

The answer is amazingly accurate, if we have the average power consumption (Megawatts-MW) figure from the power company at any time of the day.

Suppose a big city is consuming 100-MW at a given time. Assuming we use 100 volts AC at consumer homes, then at any given moment the instantaneous resistance (R in ohms) of the city is simply given by the formula:

Power(watts) = (Volts x Volts) / Resistance (R in ohms)..........or,

P=V2/ R, therefore,

R = V2/P (ohms)......... then,

If:

V=100 volts (ac)

P= 100,000,000 watts

Then:

R = 100 x 100 / 100,000,000 = 0.0001 (ohms)

(make sure to use only watts, volts and ohms in the formula above).

Good Luck !

The resistance is simply the value of resistances of all electrical equipment connected in Parallel by all consumers in a big city.

The answer is amazingly accurate, if we have the average power consumption (Megawatts-MW) figure from the power company at any time of the day.

Suppose a big city is consuming 100-MW at a given time. Assuming we use 100 volts AC at consumer homes, then at any given moment the instantaneous resistance (R in ohms) of the city is simply given by the formula:

Power(watts) = (Volts x Volts) / Resistance (R in ohms)..........or,

P=V2/ R, therefore,

R = V2/P (ohms)......... then,

If:

V=100 volts (ac)

P= 100,000,000 watts

Then:

R = 100 x 100 / 100,000,000 = 0.0001 (ohms)

(make sure to use only watts, volts and ohms in the formula above).

Good Luck !

Difference between lumen's and ANSI lumen's?

Both are unit of brightnes and usually shows numerical value of brightness in projector. lumen is measering unit of each pixel which generates by light source .it tallest brightness away from centre and other mansion is equally distributed cause of generated by led .

How do you design a transformer with three phase 400v input and single phase 2000v output?

By design are you going to wind the transformer yourself? In your design you need a 5:1 ratio. On the output side of the transformer any two legs of a three phase transformer is considered single phase voltage. Good luck on your project.

What engines can be used as a replacement of the 23L Isuzu pickup motor?

The only replacement for your 2.3 is another 2.3 or a 2.6 out of a '88-91 Trooper, '89-94 Amigo, '88-95 Pup, or '91-96 Rodeo.

information has been edited because the original poster has no clue what they are talking about.

Is it safe to run a 220 volt AC to 12 volt DC step down transformer in a 110 volt outlet and will it transform it to 6 volts or will it run at 12 volts?

Since there is an AC to DC converter in there, it's hard to say. If it's a basic transformer to rectifier to capacitor design it will put out 6 volts. If it is a transformer to a voltage regulator it's hard to say what will happen. Certainly the drive voltage to the regularor will be cut in half. It may or may not run, but won't be able to run at 12 volts because there won't be any 12 volts to drive the regulator. (There will only be 6 volts.) If it is a switcher it may work fine or it may do nothing.

Three electric cells each have a voltage of 1.3Vwhat is the total voltage of the three cells if the cells are connected in parallel?

voltage is still 1.3V

in parallel circuit, voltage stays the same but current adds up

in series circuit, voltage adds up but current stays the same

What is closed circuit air conditioning?

Closed Circuit Air Condition, known as CCAC as well... It's used in Data centers

What is the verdict of R. v. Clow?

Second degree murder, but it was appealed. The final verdict was manslaughter.

What does the voltage rating on a battery mean?

Voltage rating usually refers to the insulation of the wire but could be terminology for electrical equipment also. In North America standard voltage ratings of wire are 300, 600, 1000, 5Kv, 15 Kv and 25 Kv.

What cause high reflected power in transmission line?

Poorly matched terminating impedances will result in high reflection. Tuning networks on both ends are used to tune the source and load to the same impedance as the transmission line.