Electrical Engineering

fs cos bsn

number of males/number of females at birth

A generator produces an alternating current, still it gives d.c. output because we use slip-rings at the terminals of actual output of generator.

because its much safer to switch the hot wire then the neutral wire because if you are working on a light fixture for example and the switch is off if you ground yourself out to the neutral you become the load or return. a neutral shock can me more dangerous at times

If you are trying to recover the silver for reclamation don't bother. The silver is silver plated on the contact faces. it is only thousandth of an inch in thickness. The copper that the contact is made of would be worth more that the silver content on the copper. This is why electrical contacts should never be filed but burnished. Once the silver coating has been destroyed due to many opening and closing of the contact faces the contact face has but a short life left. Copper to copper contact faces burn up very fast due to excessive arcing and pitting. Once this starts the contact faces start to acquire a resistance rating which leads to higher heat generated at the contact face. Eventually the contact faces burn up making the breaker or contactor inoperable.

Not necessarily.

Set it to infinite which may be a sideways 8. When you touch the leads the needle should swing to zero. If it comes to rest on a different number such as 10 then change the batteries. If it continues to give the same reading then you may need to replace it.

Secondary.

Regulation of an alternator is varying or adjusting the d.c. current flow (excitation current) in the revolving field coil to control the output voltage. When an alternator is subject to varying load conditions, and therefore changing load resistance at the output, the output voltage will vary in response. When output voltage is reduced in response to increased load (reduced output resistance), the "voltage regulator" will respond by increasing the excitation current to increase the voltage output. If load is reduced, the generator will momentarily become over-excited and the ouput voltage will increase. The voltage regulator responds by decreasing excitation current, returning the generator output voltage to its nominal level.

In double cage and deep bar the tarting torque increases due to skin effect in the rotor wire. So the rotor circuit draw less current than simple circuit that draw around 7-8 times the rated current on starting.

Due to skin effect the rotor resistance increases and it provide maximum torque at low speed.

Means that there are Zero Volts or said another way, a zero potential.

this is just for induction test

One kilohm = 1,000 ohms, so without even thinking about the decimal point:

First, .960 is nearly one (1.000), so .960 kohm is almost a full kilohm, or nearly a thousand ohms.

So, since the answer will include the digits 9, 6, and maybe some zeros following, what are the possibilities: 9.6, or 96, or 960 or 9600 ohms? The logical choice is 960 ohms

Dc chopper is a static device which converts constant dc source to variable dc.

When compared by volume, copper is best, then aluminum and finally iron. When compared by weight, aluminum is better than copper. You have to compare by volume because aluminum is so much lighter than copper, an aluminum wire that weighed the same as a copper wire would be much bigger and harder to work with.

my thinking is it just cranksbut no start, when you put power to this wire the should be clicking sound near trottle body if click is heard the leave power on it it should start but if not hot when key is off will cut off with key from battery you have to disconnect the hot wire to shut engin off

for test you can do from battery ,but must be keyed hot if that is problem

The series resistance is 4 x 50 = 200 Ohms. You would need additional information to get the current; usually this is calculated from the voltage. current = voltage / resistance.

The series resistance is 4 x 50 = 200 Ohms. You would need additional information to get the current; usually this is calculated from the voltage. current = voltage / resistance.

The series resistance is 4 x 50 = 200 Ohms. You would need additional information to get the current; usually this is calculated from the voltage. current = voltage / resistance.

The series resistance is 4 x 50 = 200 Ohms. You would need additional information to get the current; usually this is calculated from the voltage. current = voltage / resistance.

About 20 years or so back, Federal Pacific lost their rating and certification by Underwriters Laboratories (UL). The design and operation of the breakers no longer met the criteria required for listing by UL. My home had a Federal Pacific panel that was installed at the end of World War II. The main breaker to my home was also a Federal Pacific. I never had a failure of a breaker to trip in an overload condition.

It may be wise to replace your FP breakers with a new and modern panel that is certified by UL. Should your home or business be involved in a fire ruled to be electrical in origin you may find that your insurance company would use that as a reason to not pay. I am not an attorney and certainly do not presume to give legal advice, I have, however, dealt with insurance companies and I am somewhat familiar with how they operate.

Chances are that your breaker panel is a number of years old. For safety and peace of mind it may be wise to consider an upgrade.

My panel was replaced about 3 years back when I installed a standby generator.

The main circuit breaker to my home was 50 amps with only 8 distribution circuits. This was before the days of central air and heating, electric water heaters, and electric ovens and stove tops. Today, this would not approach passing building code requirements.

No. This would mean more power is used than is provided - an impossibility. It is possible that you may not be accounting for a power source in your circuit, or have the actual source modelled incorrecty.

The voltage itself will determine the direction of current (assuming there isn't another source pushing current through the source backwards); the amount of current will be determined by the thevenin equivalent resistance of the circuit connected to that source (the resistance "seen" by the source, which can be lumped into a single circuit element).

On a three phase system, when one of the leg fuses opens due to a fault current on that leg, the system is said to be single phasing.

have to install individual capacitors or capacitor banks.power factor analyzing prior to this important as well harmonic analyzing.refer wikipedia for power factor correction

most single phase motors are corrected by single capacitor parallel to motor input ,

Diodes are electronic components that act like switches. They conduct electricity in one direction and block electricity in the opposite direction. Because of the switch-like behavior, diodes are often used in power supplies for converting AC electricity to DC. Diodes can also modify the waveform of AC electricity, through the processes of limiting and clamping.

R3gaRdX: Hasnain Ali

hasnain_ali_2012@yahoo.com

By definition a short circuit is the path of least resistance of current flowing through a circuit be it three phase or single phase. The main cause of this condition in electrical circuits is an insulation break down. This break down can be caused by overheating of the insulation to a point where the insulation disintegrates from the conductor that it is supposed to be protect. With the insulation missing from the wire there is the possibility of a short circuit to surrounding grounded material.

The other cause of insulation break down is from vibration. Unsupported conductors can vibrate against their metallic enclosures to a point where the insulation is just worn away. Once the insulation becomes thin enough the voltage will bridge the insulation threshold and take the path of least resistance to ground and a short circuit will occur.