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diff --git a/608/CH21/EX21.14/21_14.sce b/608/CH21/EX21.14/21_14.sce
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+//Problem 21.14: The armature of a d.c. machine has a resistance of 0.25 ohm and is connected to a 300 V supply. Calculate the e.m.f. generated when it is running: (a) as a generator giving 100 A, and (b) as a motor taking 80 A.
+
+//initializing the variables:
+Ra = 0.25; // in ohms
+V = 300; // in Volts
+Ig = 100; // in Amperes
+Im = 80; // in Amperes
+
+//calculation:
+//As a generator, generated e.m.f.,
+// E = V + Ia*Ra
+Eg = V + Ig*Ra
+//For a motor, generated e.m.f. (or back e.m.f.),
+// E = V - Ia*Ra
+E = V - Im*Ra
+
+printf("\n\n Result \n\n")
+printf("\n (a)As a generator, generated e.m.f. is %.0f V ",Eg)
+printf("\n (b)back e.m.f. is %.0f V ",E)
+\ No newline at end of file