Electrical Engineering - Magnetism and Electromagnetism - Discussion

Discussion :: Magnetism and Electromagnetism - General Questions (Q.No.{QUES_NO})

Pinky said: (Nov 15, 2011)  
What is the formula of reluctance ?

Vishal said: (Dec 10, 2011)  
It is the oppose or resist of the magnetic flux in magenetic circuit.

Ish said: (Dec 12, 2011)  
s=l/ma[ wher l=inductance , m=permeablity (4*3.14*10^(-7)) a=area]

Md. Shamim said: (Dec 26, 2011)  
In magnetic circuit Reluctance have the same role as Resistance in electrical circuit. Resistance=EMF/I and Reluctance= MMF/FLUX=AT/FLUX

Roshini said: (Jan 10, 2012)  
How to calulate mmf.reluctance=mmf/flux ?

Shailaja said: (Jan 18, 2012)  
What is MMF value?

Sandyakiran said: (Feb 2, 2012)  
MMF means magneto motive force.

Naveen said: (Apr 17, 2012)  
reluctance=l/(mA)
l-magnetic circuit length not the inductance
m-permeability
A-cross sectional area
flux and cross sectional area given for the problem we need l to find the reluctance..

Sudhakar said: (Jul 18, 2013)  
Reluctance = L/(mu)A = inductance/((absolute permeability*relative permeability)*Area).

Deepak Kumar Senapati said: (Feb 20, 2014)  
How will we derive the formula ?

Alice said: (Apr 19, 2014)  
We need current and number of turns or mmf or length to find reluctance.

Prajith said: (Oct 14, 2014)  
Reluctance = l/m0mrA.
l ==> length of the magnetic circuit.
m0 ==> permeability.
mr ==> relative permeability.
A==> area of cross section.

But how to solve this question?

Fan said: (Dec 31, 2014)  
Circuit in problem 9? Really?

Mahesh said: (Apr 14, 2015)  
Someone please clarify how 8,727 At/Wb answer will come?

Stuti Kushwaha said: (Feb 23, 2016)  
Please solve anyone.

Gopalan said: (Mar 5, 2016)  
Question not clear ?

AT is not given?

Mak said: (Apr 6, 2016)  
MMF value is in ampere-turns, this is analogous to the EMF which is in volts. MMF is in magnetic while EMF is an electric.

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