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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
its due to truncation on the transmission of voltage with an electric current. The copper wiring has a high capacity due to years of fecal devolging.
The voltmeter has greater accuracy when measuring what kind of current?
A voltmeter has greater accuracy when measuring direct current. This kind of current is constant unlike alternating current which has constant fluctuations.
Wind resistance doesn't exist The correct term is Air resistance, which is the force that pushes against an object while travelling. For example, air resistance constantly pushes against a car whilst it is moving. This is because a car has to 'split' the air to travel through it.
Air resistance can be decreased by making the object (for example a car) more aerodynamic like an F-1 racer. Aerodynamic help to channel the air around the object and allowing it to push through the air easier.
I can't go in-depth as it can get quite complicated, but I hope this helps anyway.
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I think you mean, 'insulation' resistance! It's the resistance of insulation, normally expressed in megohms.
Increases
Why are charge capacitors dangerous?
Charge Capacitors , like all capacitors shift the voltage 90 degrees, tiny one form tuned circuits and do a multiple of functions like blocking DC and allowing AC to pass . But as your name indicates a charge or charged Capacitor can kill you with shock . Or simply knock you silly for a fraction of second .
A DOL or direct on line starter works by connecting the motor terminals directly to the power supply when they are energized. A DOL starter is the simplest type of motor starter.
What does inductive load effect on High Voltage transmission line?
the inductive load which is generally use in high voltage transmission line known as transformer. the transformer transform the high voltage to low voltage.
How can convert active power to reactive power and apparent power too?
'Active' power describes the rate at which energy is delivered to a load and is permanently lost, and is expressed in watts. 'Reactive' power describes the rate at which energy is alternately stored within a magnetic or electric field and returned to the supply every quarter-cycle, and is expressed in reactive volt amperes.
You cannot 'convert' one to the other.
'Apparent' power is the vectorial sum of active power and reactive power, and is expressed in volt amperes.
Electrical stress is nothing but the stree imposed by electricity at any point.. due to insulation breakdown or induction or atmospheric conditions. Usually its caused on the live conductor due to other conductor or insulation.
Have u ever heard hissing noice from a electric pole. Its a kind of electric stree
Can registered electrical engineer could sign on electrical plan?
RA 7920:
Sec. 31.
Field of Practice. - The field of practice for professional electricalengineers, registered electrical engineers, and registered master electricians
shall be as follows:
(a) A professional electrical engineer's field of practice includes the sole
authority to seal electrical plans, etc., and to practice electrical engineering
in its full scope as defined in this Act;
(b) A registered electrical engineer's field of practice includes charge or
supervision of operation and maintenance of electrical equipment in power
plants, industrial plants, watercraft, electric locomotive, and others;
manufacture and repair of electrical supply and utilization equipment
including switchboards, power transformers, generators, motors,
apparatus, and others; teaching of electrical subjects; and sale and
distribution of electrical equipment and systems requiring engineering
circulations or application of engineering data; and
(c) A registered master electrician's field of practice includes the
installation, wiring, operation, maintenance and repair of electrical
machinery, equipment and devices, in residential, commercial,
institutional, commercial and industrial buildings, in power plants,
substations, watercrafts, electric locomotives, and the like: Provided, That
if the installation or the machinery is rated in excess of five hundred
kilovolt-amperes (500 Kva), or in excess of six hundred volts (600 V) the
work shall be under the supervision of a professional electrical engineer or
a registered electrical engineer.
Why generator rotating anticlockwise?
Its all a matter of perspective. If you look at one end of the generator and note that it is turning anticlockwise, then it is true that it will be turning clockwise as viewed from the other end.
What is diversity factor in electrical installation?
When you are determining the electrical load of certain appliances, such as a stove (range), it's unnecessary to add together ALL the individual heating loads (oven, rings, etc.) because, under most circumstances, they are rarely operated altogether at the same time. For example, the IEE Regulations (for the UK) specify that, when determining the total load for a 'cooking appliance', the calculated load current should be 10 A of the overall rated current, plus 50% of the rated current, plus 5 A if the appliance has a socket outlet incorporated.
What are shading bands and why are they provided in energy meters?
shading bands are used to increase the magnetic field in shunt magnet in single phase energy meter. They also used for reduce the friction error.
Why pole changing method of speed control of three phase induction motor can not be used?
because its possible only where pole changing arrangements are given and pole changed motor draws more current then its actual pole which damages its windings.
What is the conductance of a circuit that has ten ohm resistance?
0.1 mhos
mhos = 1 / ohms
Another Answer'Conductance' is the reciprocal of resistance, and its SI unit of measurement is the siemens (symbol: S). The 'mho', its former unit, has not been used since the 1960s. So the answer is 0.1 S.When the potential is high the current passing through a conductor it is also high true or false?
I think you mean when the 'potential difference' is high, is the current also high? The answer is that it depends on the impedance (a.c.) or resistance (d.c.) of the circuit. If this remains constant, then raising the potential difference will cause the current to increase too.
How can you reduce reactive power?
If, for example, the reactive power of a load is due to its inductance, then installing a capacitor in parallel with the load will reduce the overall reactive power.
What is the frequency of ripple components in the output of capacitor filter?
It depends on whether or not it is a half wave or full wave rectifier. For a single phase 60 Hz rectifier, a half wave rectifier will be 60 Hz while a full wave rectifier will be 120 Hz. A three phase full wave rectifier will be 360 Hz.
What is the capacitor and how many types?
A capacitor is a circuit component that stores energy in the electric field set up between its plates.
Capacitors are named after the dielectric used to separate their plates (e.g. 'mica' capacitor), and there are lots of different types of dielectric used (too many to list), so there are a corresponding number of types of capacitor.
But you can also categorise a capacitor as being 'polarised' or 'non-polarised'; electrolytic capacitors are 'polarised', which means that they must be connected into a circuit while taking into account the polarity of their terminals.
Finally, you can categorise them as being 'fixed value' or 'variable'.
How many windings does a auto-transformer have?
A true autotransformer consists of one, tapped, winding. For a step-down transformer, part of the winding is in series with the supply and the other part is common to both the supply and the load. For a step-up autotransformer, part of the winding is in series with the load, while the other part is common to both supply and load.
But you can also use a mutual transformer as an autotransformer, by connecting the two windings in series and, then, described as above.
Why might the current in a short circuit be higher than the current in the original circuit?
The current in a short circuit may be very high because the resistance in the short circuit is probably less than the resistance in the original circuit.
Can we improve generator power factor for increasing active power?
The 0.8 Power Factor provided by generator manufacturers is not the load power factor, but it is the nominal power factor used to calculate the kW output of an engine to supply the power for a particular alternator kVA output. Alternators are therefore designed to supply their rated kVA at 0.8 lagging power factor.
