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...

previous year paper of ntpc bhel for degree in electrical enng

0 Answers  

when we change tha taps from 1-16 in 100mva tr whether a constant voltage avaliable till it reaches tap 16 or voltage change as per taps change

1 Answers  

Is there possible to Test Transformer for Overfluxing Capability. Or is there any firm who does Overfluxing Test on Transformer?

0 Answers  

why the earth terminal in three pin top is longer than rest of the two terminal and of bigger size?

6 Answers   BARC, MAHINDRA,

what is the technical term when and alternator's prime mover fails.

3 Answers   DVC,

What is the actual calculation for transformer short circuit test?.

0 Answers  

Hoe to calculate body earthing conductor size ?

1 Answers   IES,

why microprocessors are named as 8085 ,8086 etc? what's the reason for this???

15 Answers   Bhel, HCL,

which type of motor is used in lift ?

7 Answers  

write down the formula of cable size in RM if current is 50Amp.

0 Answers  

How to convert a two phase power into a three phase power in induction machine?

0 Answers  

why we use ac system in india why not dc

3 Answers