Answer / sateesh

Whenever an alternating current pass through the conductor
the current density is near the surface of the conductor is
greater than the core(middle of the conductor).

Answer / pankaj malhotra

When DC supply is given to the conductor, current flows
uniformly throughout the cross section of the conductor.
But in case of AC, Current does not flows uniformly
throughout the cross section and concentrate near the
surface of the core. The concentration of current near the
surface of the core is the skin effect.

Answer / dharmendra

Boss, Simple thing...!
R= ρ x L / A
For any conductor L can be any thing (1,10,50,500 Meters.....so on), row (ρ) resistivity will be constant for AL or CU.
Now this whole thing which is playing here is A, as its inverse proportional to R

at center A=0; R= ∞ at mid A= crossection area/2,; R will be double .
and at Surface A= cross section area, (means R will be minimum),

Current is also lazy as we engineers are, hence it will go through the path where R will be minimum, so it will flow over the outer most skill of CU or AL conductor,
This is called skin effect.
GOT IT MY FRINED.....!

Answer / minal verma

ccording to skin effect, ac current flows only on the
surface of the conductor.No current flows at the centre of
the conductor.Thus the surface area of the flow of the
current will be less.

what is meant by Back emf ?where its occur ?

6 Answers  

---

How many earthing pits required for diesel generator set ? Why ?

1 Answers  

---

why, when birds sit on transmission lines or current wires doesn't get shock?

36 Answers   College School Exams Tests, Infosys,

---

why do we need the body earth?

4 Answers  

---

if we convert kva into Ampers,which one formula use by us,pls tell me?

7 Answers   ABB,

---

---

Short circuit test of induction motor is carried out to compute= A stator resistance B rotor resistance C magnetizing reactance D stator reactance

2 Answers  

---

explanation of mesh bus bars

0 Answers   Eskom,

---

please give me all the Alarm .Trip ,Safety Relays & Conditions of Diesel-generators mail me on ashokbabunhce@gmail.com

0 Answers  

---

If Polarization index of motor 8.75 at 500volts of medium voltage 4.16 KV motor what this mean winding good or bad pl answer if any reffrence book give me the link

0 Answers   Marafiq,

---

detailed procedure how we calculate cost for pcc m10 and rcc m20 including centering and labour excluding steel/ iron

0 Answers  

---

How many types of relay are present in a VCB and ACB, what are the tests we can conduct on both breakers and how to set the relays values

2 Answers   Hyundai, Sodexo,

---

we hav seen in electric engine of trains only 1 wired slidng conecctn is there frm ovrhead line,howevr to complete a ckt in dc postv n negtv two conection has to b there...so where is tht negative is been connectd or where it is grounded...?

5 Answers   ABB,

---