From 7bc77cb1ed33745c720952c92b3b2747c5cbf2df Mon Sep 17 00:00:00 2001
From: prashantsinalkar
Date: Sat, 3 Feb 2018 11:01:52 +0530
Subject: Added new code

---
 3830/CH7/EX7.8/Ex7_8.sce | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 3830/CH7/EX7.8/Ex7_8.sce

(limited to '3830/CH7/EX7.8/Ex7_8.sce')

diff --git a/3830/CH7/EX7.8/Ex7_8.sce b/3830/CH7/EX7.8/Ex7_8.sce
new file mode 100644
index 000000000..1bdb07e06
--- /dev/null
+++ b/3830/CH7/EX7.8/Ex7_8.sce
@@ -0,0 +1,30 @@
+// Exa 7.8
+
+clc;
+clear;
+
+R = 200; // strain gauge resistance in Ohms
+G = 2.5; // Gauge factor
+RL = 400; // load resistance in Ohms
+V = 24; // input voltage in volts
+S = 140; // applied stress in mgf/m^2
+Y = 200; // Modulus of elasticity in GN/m^2
+
+// Solution
+
+V_normal = V*(R/(R+RL));
+
+printf('Voltage across strain gauge = %d V \n',V_normal);
+e = (S*10^-3)/Y;
+// Strain e =   dell_L/L
+//dell_R/R = G* dell_L/L;
+// so,
+dell_R = R*G*e;
+
+
+//strain gauge under strained condition
+V_strained = (R+dell_R) * V/(R+dell_R+RL);
+printf(' Voltage across strain gauge under strained condition = %.4f ohms \n',V_strained);
+
+dif = V_normal - V_strained;
+printf(' Change in output voltage = %.2f mV \n',abs(dif*10^3));
-- 
cgit