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+// To find the value of unknown resistor
+// Modern Electronic Instrumentation And Measurement Techniques
+// By Albert D. Helfrick, William D. Cooper
+// First Edition Second Impression, 2009
+// Dorling Kindersly Pvt. Ltd. India
+// Example 4-6 in Page 64
+
+
+clear; clc; close;
+
+// Given data
+S = 100; //Sensitivity of the voltmeter
+// Three ranges of the voltmeter
+V_1 = 50;
+V_2 = 150;
+V_3 = 300;
+V_p = 4.65; //Reading of the meter on its 50-V scale
+R_s = 100*10^3;
+E = 100; //emf applied in volt
+//Calculations
+R_V = S * V_1;
+R_p = ceil(V_p *R_s/ (E -V_p)); //R_p is the parallel resistance of R_x and R_v
+R_x = R_p *R_V/ (R_V -R_p);
+printf("The value of the unknown resistance R_x = %0.1e ohm",ceil(R_x));
+
+//Result
+// The value of the unknown resistance R_x = 2.0e+005 ohm 
+\ No newline at end of file