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diff --git a/182/CH3/EX3.9/example3_9.sce b/182/CH3/EX3.9/example3_9.sce
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+
+// example 3-9 in page 53
+clc;
+//given data
+A=['a' 'b'];
+Rm=1e+3;// coil resistance of 1 k ohm
+Rs=890.7e+3;//multiplier resistance in ohm
+Vf=0.7;//voltage drop across the diode in volt
+//calculation
+m=0;// reference to indicate a and b respectively
+for n=75:-25:50 //voltages 50 and 75 volts
+    Iav=(0.637)*(((1.414*n)-2*Vf)/(Rs+Rm));// average current through pmcc instrument in ampere
+    m=m+1;
+    printf("(%c),\nIav for %d V is %.2f micro-A\n",A(m),n,Iav*10^6);
+    printf("pointer indication for %d V is %.2f FSD\n",n,10000*Iav);
+end
diff --git a/182/CH3/EX3.9/example3_9.txt b/182/CH3/EX3.9/example3_9.txt
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+9. (a),

+Iav for 75 V is 74.76 micro-A

+pointer indication for 75 V is 0.75 FSD

+(b),

+Iav for 50 V is 49.51 micro-A

+pointer indication for 50 V is 0.50 FSD
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