1 files changed, 16 insertions, 0 deletions
diff --git a/728/CH8/EX8.9/Ex8_9.txt b/728/CH8/EX8.9/Ex8_9.txt
new file mode 100755
index 000000000..adb62dde3
--- /dev/null
+++ b/728/CH8/EX8.9/Ex8_9.txt
@@ -0,0 +1,16 @@
+//Caption:Calculate (i)-Axial phase velocity ,(ii)-Anode voltage at which TWT can be operated for useful gain
+//Exa:8.9
+clc;
+clear;
+close;
+e_m_ratio=1.759*10^11;//(e/m)
+c=3*10^8;//in m/s
+d=0.002;//diameter(in m)
+pitch=(1/50)/100;//As,50 turns per cm (in m)
+circum=%pi*d;
+v_p=c*pitch/circum;
+V_o=v_p^2/(2*e_m_ratio);
+disp(v_p,'Axial phase velocity (in m/s) =');
+disp(V_o,'Anode Voltage (in kV) =');
+
+//Answer in book is wrongly given as V_o=25.92 V
+\ No newline at end of file