From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 174/CH4/EX4.2/example4_2.sce | 55 ++++++++++++++++++++++++++++++++++++++++++++
 174/CH4/EX4.2/example4_2.txt |  4 ++++
 2 files changed, 59 insertions(+)
 create mode 100755 174/CH4/EX4.2/example4_2.sce
 create mode 100755 174/CH4/EX4.2/example4_2.txt

(limited to '174/CH4/EX4.2')

diff --git a/174/CH4/EX4.2/example4_2.sce b/174/CH4/EX4.2/example4_2.sce
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+// To design Ayrton shunt
+// Modern Electronic Instrumentation And Measurement Techniques
+// By Albert D. Helfrick, William D. Cooper
+// First Edition Second Impression, 2009
+// Dorling Kindersly Pvt. Ltd. India
+// Example 4-2 in Page 57
+
+
+clear; clc; close;
+
+// Given data
+I_1 = 1; //Full scale currents of the ammeter in amp
+I_2 = 5;
+I_3 = 10;
+R_m = 50; //Internal resistance of the movement(the coil) in ohm
+I_m = 1*(10^-3); //Full scale deflection of the movement in ampere
+
+//Calculations
+// On the 1-A range: 
+I_s1 = I_1 - I_m; // calculating current through shunt
+//Using the eq. R_s = I_m * R_m/ I_s
+//1                       R_a +R_b +R_c = I_m * R_m/ I_s; // As (R_a +R_b +R_c) are parallel with R_m
+
+// On the 5-A range
+I_s2 = I_2 - I_m;
+//2                       R_a +R_b = I_m * (R_c +R_m)/ I_s; // As (R_a+R_b) in parallel with (R_c+R_m)
+
+// On the 10-A range
+I_s3 = I_3 - I_m;
+//3                       R_a = I_m * (R_b +R_c +R_m)/ I_s; // As R_a is parallel with (R_b +R_c +R_m)
+
+
+//Solving the 3 simultaneous linear equations
+function y = rr(R);
+y(1)= R(1) +R(2) +R(3) - (I_m * R_m/ I_s1);
+y(2)= R(1) +R(2) -(I_m * (R(3) +R_m)/ I_s2);
+y(3)= R(1) -(I_m * (R(2) +R(3) +R_m)/ I_s3);
+endfunction
+
+answer = fsolve([0.1;0.1;0.1],rr);
+R_a = answer([1]);
+R_b = answer([2]);
+R_c = answer([3]);
+
+disp('The different resistors used for the ayrton shunt for different ranges are:');
+printf("R_a = %f ohm\n",R_a);
+printf("R_b = %f ohm\n",R_b);
+printf("R_c = %f ohm",R_c);
+
+//Result
+// The different resistors used for the ayrton shunt for different ranges are:   
+// R_a = 0.005005 ohm
+// R_b = 0.005005 ohm
+// R_c = 0.040040 ohm 
+
diff --git a/174/CH4/EX4.2/example4_2.txt b/174/CH4/EX4.2/example4_2.txt
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+ The different resistors used for the ayrton shunt for different ranges are:   
+R_a = 0.005005 ohm
+R_b = 0.005005 ohm
+R_c = 0.040040 ohm 
\ No newline at end of file
-- 
cgit