Electrical Engineering

I dont think you can increase the speed of the motor but if the motor is driving some piece of rotating equipment (pump etc) the speed of the driven shaft can be increased up to the point where the motor reaches full load current.

For a series circuit such as this, simply add the resistances to get the equivalent resistance.

For a series circuit such as this, simply add the resistances to get the equivalent resistance.

For a series circuit such as this, simply add the resistances to get the equivalent resistance.

For a series circuit such as this, simply add the resistances to get the equivalent resistance.

5 kV ac means 5 kV rms, which represents a peak voltage of 5 x sqrt (2) kV, or 7.07 kV. So the dc test should provide 7070 volts.

Resistance is an opposition to electrical currrent flow, which is more formally coulombs per second, or amperes. Voltage is electrical pressure, more formally joules per coulomb. When you multiply volts and amperes you get joules per second, or watts.

Two resistors in series, one 5 ohms and one 2 ohms, with a current of 5 amperes, will have a power dissipation of 175 watts.

Ohm's law: Voltage = current times resistance

E1 = I R1 = (5) (5) = 25 volts

E2 = I R2 = (5) (2) = 10 volts

Power law: Power = current times voltage

P1 = I E1 = (5) (25) = 125 watts

P2 = I E2 = (5) (10) = 50 watts

PT = P1 + P2 = 125 + 50 = 175 watts

neither. DC locks the rotor of a stepper stationary, pulses applied to a stepper's windings in one order advances it while in the opposite order reverses it. steppers typically have 4 to 6 windings.

This is because the uA is much smaller than the mA. If you were to add 5 mA to 5uA that would be equivelent to adding 5000uA (mA is 1000x larger than uM) to 5uA. Your total for the example would be 5005uA.

divide the voltage by each resister individually then add the totals together.

1.5/6=.25

1.5/6=.25

.25+.25=.5 A

The voltage needed to make a resistance measurement varies in proportion to the Ohms value being measured. Resistance measurements in the order of thousands and up to one Megohm are low enough to be made with a 1.5 volt or similar cell. However, resistance measurements in the order of hundreds to thousands of Megohm will require a higher voltage of up to 500 Volts DC. A Megger is a device that uses hundreds of volts to make resistance measurements.

For a standard 360 deg sine wave with starting point of 0 deg, peaks will occur at 90 deg and 270 deg.

Generally we use CBCT for earth fault/earth leakage relay tripping. Since the CBCT is going to provide on neutral side, first we have to find the full load current. If the full load current is 500A we have to use 100A/5A (ie 1/5th of full load current) CBCT.

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If the bulbs are wired in series, the voltage rating for each bulb is the source voltage divided by the number of bulbs in the series. You can tell if they're wired in series by removing a bulb. If all of the other lights go out, you have a series circuit. If all of the other bulbs stay lit, you have a parallel circuit. If half of the lights go out and the other half stay lit, you have two series circuits in parallel. The source voltage is about 110 volts in North America or about 220 volts in Europe (I don't know about Asia or Australia). If you have a series/ parallel mix, count only the bulbs that go out with the one you removed. For example, if you have 50 lights in one series in North America, the voltage across each bulb is about 2.2 volts.

No, this voltage appears ACROSS individual phases, or BETWEEN a line conductor and the neutral

To answer these types of questions, a voltage of the single phase motor should be stated. It has to do with the breaker sizing and wire sizing and current load.

The RPMs of a D.C. motor will vary depending on the torque required for the application. The more torque required the slower the RPMs. Higher torque requirements will also increase the AMP draw of the motor. Other reasons the RPMs can vary is heat build up, low voltage of batteries, cable size, connection condition and others. You need to make sure your connections are clean, the cables are thick enough to handle the AMP load and your batteries are fully charged for peak performance.

Depends on what the voltage is being stepped down in that particular control transformer. Control transformers usually step down a voltage of 480/208v to 120V.

The 120Volts can now be used in safer manner to "control" start/stop buttons, and other components that are only built to run on 120V

Voltage is typically quite low, around 4v to 10v. Current though will fluctuate highly during the flashing as short circuit is made and broken, perhaps 15,000 amp at peaks. Often continuous current would be also applied during the butting part of the cyle, this also would be be of a similar order.

rust forms on an iron pipe after prolonged exposure to humid air what type of change does this illistrate? Chemical is it

barometer/volmeter

light meter/barometer

volmeter/themometer

themometer/light meter

An electrical cell is the basic unit from which electrical batteries are made.

The cell is composed of two plates made of different conductive materials and a liquid electrolyte (in "dry" cells this liquid is in the form of a moist paste). Electric charge is produced between the two plates by the electrolyte interacting with and causing corrosion of one or both plates.

Once the electric charge is produced the corrosion process slows or stops, unless an external circuit is connected between the plates. When an external circuit is connected between the plates, current flows through that circuit and the electric charge is slightly reduced. The corrosion process continues at a rate necessary to maintain the electric charge, until the chemicals in the cell are used up.

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DG set is designed for 0.8 lag power factor. if it fall below this, we can used proper rating capacitor to improve this. what happens if we run the DG at .6 pf

if you have a meeger, then the ductor test it's its complemet. ductor test is carried out to find very low resistance such as contact or ground.

The "flow of current" is considered to be in the opposite direction.