Answer / senthil nathan

speed of current depends upon choice of material which is
used for electricity,potential difference exists and
resistivity of the material.
These factors fixing the speed of the current.

Answer / sunil

all above answers are wrong.......
the speed of current is the speed of electrons moving in a
conductor....which is the well known DRIFT VELOCITY.....its
magnitude is very less as compared to speed of light....

friends,actually it is the electric field which propagates
with the speed of light in space.........

Answer / bym

The speed of electrons as they travel down a copper wire is
measured in millimeters/sec. This speed changes as the
voltage, amperage, wire material, and wire size change. This
is called the "drift velocity".

However, a signal will travel down a wire at slightly less
than the speed of light: ~2/3 light speed in a coaxial
cable. This is the propagation speed. The exact propagation
speed is different for different wire materials. Shielding
of the wire also changes propagation speed. The speed
further changes depending on heat & pressure, though in
general, we don't experience enough difference to notice.

Think of it as the difference between wind and sound. The
movement of the electrons is analogous to wind, which rarely
goes faster than 40 mph, and depends on pressure differences
(applied voltage). Where as the speed of the signal is
analogous to the speed of sound, which is ~700 mph,
depending on heat and pressure (state of the material).

Answer / ujjawal

ani eri puku answers a okati correct ga ledhu

Answer / akarshan tiwari

The electron drift velocity is estimated to be very
slow.how there is current established almost the instant
the circuit is closed?
The information about bigining of the flow of current is
transmitted through the propogation of electromanetic waves
(electric impulse)and not with the drift velocity of the
electron.

Answer / raja

THe speed of current is the velocity of flow of free electrons.

Answer / sunil yadav

the speed of current is the rate of flow of electrons in a
conductor.. n that is the DRIFT VELOCITY... the speed of
current being equal to the speed of light is a pure
misconception...
drift velocity=(mu)*E
mu= electron mobility; it's value depends on the type of
material..

Answer / imran yousuf zaregar

simple speed of current depends on voltage...... so, speed
of current varies with respect to voltage.

Answer / dhiva

speed of current depends upon flow of electrons which will
consider load and size of conductorand resistance.

Answer / birobrata deb

speed of the current depends upon the drift velocity of the
electron of that conductor through which the current is
flowing...

Our Company's Contract Demand is 110 kVA. We use 12 Capacitors each of 12.5 kVAr Capacity to maintain Power Factor of 0.99. So, what steps should we take so that our Contract demand does not exceed 110 kVA?

1 Answers   Jindal,

WHAT INSTRUMENT IS USED TO MEASURE THE MAGNETIC FLUX?

7 Answers  

what will be happen if we apply D.C supply to the transformer

14 Answers   CCBPL,

CAn a TJM 10 relay measure over current ?

2 Answers  

how many types erthig

6 Answers  

What is meant by shunt current?

1 Answers   ABC,

why impedance relay is used for medium transmission line protection

0 Answers  

I am new guy as an electrical engr. in a 100MW HFO based power project. I am in operations division. I have noticed from last few days, my supervisor sends the last 24 hours energy generation calculation to my plant manager. I have noticed, he calculated last 24 hour's generated energy differences in KWH then he multiplied it with a multiplying factor 960. for example: total difference =2.685 KWH*960= 2577.6 MWH. but he does not not know what is multiplying factor 960?? can anybody explain it??

1 Answers   Orion,

what objective books are good for preparing for PSU's?

3 Answers   NTPC,

How to calculate Grid rotor resistance(GRR) losses in slip ring induction motor?

0 Answers  

WHY NOT CONSIDER PROTONS IN ELECTRICITY LIKE ELECTRIC CURRENT?

1 Answers  

IF we have 500kva transformer 11.0/0.415V, 50Hz. How to calculate the current on HT & LT side, how can we consider for its breaker (HT & LT both)? You are requested to solve the question herewith.

3 Answers   Bhutan Power Corporation,