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+clear
+//
+//case a
+i=60
+eb1=450
+ia=15.18 //derived from problem
+//using formula n2/n1=(eb2*phy1)/(eb1*phy2)
+eb2=45.54
+rse=(eb1-eb2)/ia
+printf("\n rse= %0.1f ohm",rse)
+//case b
+ia=38.97 //derived
+//using the above used formula
+eb2=219.21
+rse=(eb1-eb2)/ia
+printf("\n rse= %0.1f ohm",rse)