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diff --git a/3640/CH5/EX5.1/Ex5_1.sce b/3640/CH5/EX5.1/Ex5_1.sce
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+clc
+B=0.78 //flux density in tesla
+A=200*(10^(-4))//cross sectional area in centimetre square
+mprintf("Flux per pole Φ=B.A=%fWb\n",B*A)
+C=95 //no of coils
+Nc=2 //no of turns in each coil
+Z=2*C*Nc
+mprintf("Z=2*C*Nc=%fconductors\n",Z)
+n=1200 //rotating speed in rev/min
+w=(n/60)*(2*%pi)
+mprintf("w=%frad/s\n",w)//ans may vary due to rounof error
+a=2 //no of paths
+p=4 //no of poles
+Ka=(Z*p)/(2*%pi*a)
+mprintf("Ka=%fV-s/Wb\n",Ka)//ans may vary due to rounof error
+Eg=Ka*B*A*w
+mprintf("Eg=Ka*Φ*w=%fV\n",Eg)//ans may vary due to rounof error
+VT=250 //terminal voltage in volts
+ra=0.2 //armture resistance in ohms
+Ia=(VT-Eg)/ra
+mprintf("Ia=%fA\n",Ia)//ans may vary due to rounof error
+Pin=VT*Ia
+mprintf("Pin=%fW\n",Pin)//ans in textbook is wrong
+mprintf("Armature copper loss=%fW\n",((Ia*Ia)*ra))//ans in textbook is wrong
+Pd=Pin-((Ia*Ia)*ra)//ans in textbook is wrong
+mprintf("Pd=Pin-coper loss=%fW\n",Pd)
+mprintf("τd=Pd/w=%fN-m ",Pd/w)
+cf=0.7376 //conversion factor for conversion from N-m to lb-ft
+mprintf("or %flb-ft",(Pd/w)*cf)//ans may vary due to roundoff error
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