initial commit / add all books

1 files changed, 35 insertions, 0 deletions

diff --git a/3835/CH3/EX3.12/Ex3_12.sce b/3835/CH3/EX3.12/Ex3_12.sce
new file mode 100644
index 000000000..917043a7e
--- /dev/null
+++ b/3835/CH3/EX3.12/Ex3_12.sce
@@ -0,0 +1,35 @@
+clear
+//
+//given
+//case a
+B=1 //Wb/m**2
+u1=4*3.14*10**-7
+A=10**-4 //cm**2
+per=800 //permeability
+n=250 //number of turns
+flux=B*A
+printf("\n flux %0.5f  Wb",flux)
+r=781250   //AT/Wb calculated using formula for reluctance
+mmf=flux*r //AT
+i=mmf/n  //exciting current required in A
+printf("\n i %0.5f  A",i)
+l=(n*flux)/i  //self inductance of the coil
+printf("\n l= %0.5f  H",l)
+w=(l*i*i)/2  //energy stored
+printf("\n w= %0.5f  J",w)
+//case b
+airgap=1*10**-3   //air gap is assumed 
+rair=airgap/(u1*A) //reluctance of air gap in AT/Wb
+mmfa=flux*rair     //mmf of air in AT
+printf("\n mmfa")
+//rcore=((2.5*3.14)-0.1)/(32*3.14*10**-6)  //reluctance of core 
+//mmfc=flux*rcore
+mmfc=780 //AT
+F=mmfc+mmfa
+I=F/n  //A
+printf("\n exciting current= %0.2f  A",I)
+n=250 //number of turns
+L=(n*flux)/I   //self inductanc eof coil with air gap 
+printf("\n l= %0.5f  H",L)
+e=(L*I*I)/2  //energy stored in coil
+printf("\n e= %0.5f  J",e)