2 files changed, 37 insertions, 0 deletions
diff --git a/431/CH2/EX2.18/EX2_18.sce b/431/CH2/EX2.18/EX2_18.sce
new file mode 100755
index 000000000..ec0e70ce4
--- /dev/null
+++ b/431/CH2/EX2.18/EX2_18.sce
@@ -0,0 +1,26 @@
+//calculating resistance required in series
+//Chapter 2
+//Example 2.18
+//page 124
+clear;
+clc; 
+disp("Example 2.18")
+V=230;                    //voltage supply in volts
+Ia=20;                    //armature current in amperes
+Ra=0.5;                    //armature resistance in ohms
+E=V-(Ia*Ra);
+printf("E=%dV",E)
+disp("when extra resistance is added in the armature circuit,the speed is halved")
+E2=E/2;
+R=((V-E2)/Ia)-Ra;
+disp("The load torque is conatant")
+printf("extra resistance in the armature circui,R=%fohms",R)
+disp("The load torque directly proportional to square of speed")
+disp("if N is halfed, Iais one-fourthed")
+Ia2=Ia/4;
+R=((V-E2)/Ia2)-Ra;
+printf("extra resistance in the armature circui,R=%fohms",R)
+
+
+
+
diff --git a/431/CH2/EX2.18/resultEX2_18.txt b/431/CH2/EX2.18/resultEX2_18.txt
new file mode 100755
index 000000000..28ab354a8
--- /dev/null
+++ b/431/CH2/EX2.18/resultEX2_18.txt
@@ -0,0 +1,11 @@
+  
+ Example 2.18   
+E=220V 
+ when extra resistance is added in the armature circuit,the speed is halved   
+ 
+ The load torque is conatant   
+extra resistance in the armature circui,R=5.500000ohms 
+ The load torque directly proportional to square of speed   
+ 
+ if N is halfed, Iais one-fourthed   
+extra resistance in the armature circui,R=23.500000ohms 
+\ No newline at end of file