1 files changed, 8 insertions, 8 deletions
diff --git a/3428/CH19/EX12.19.7/Ex12_19_7.sce b/3428/CH19/EX12.19.7/Ex12_19_7.sce
index 265ee50bb..3bfe06170 100644
--- a/3428/CH19/EX12.19.7/Ex12_19_7.sce
+++ b/3428/CH19/EX12.19.7/Ex12_19_7.sce
@@ -1,14 +1,14 @@
 //Section-12,Example-7,Page no.-SS.61
 //To find the no.of charge carriers essential to get te given conductivity and the no. of Antimony dopant atoms to be added to germanium.
 clc;
-C=100
-e=1.6*10^-19
-u_e=2800
+C=100                        //ohm^-1cm^-1
+e=1.6*10^-19                          //C
+u_e=2800                         //cm^-1V^-1sec^-1
 N_D=C/(e*u_e)
 disp(N_D,'No.of charge carriers essential to get the given conductivity(per cm^3)')
-a=5.658*10^-8
-V=a^3
-N_Sb=2.23*10^17
-N_Ge=8/V
+a=5.658*10^-8                         //cm
+V=a^3                       //cm^3
+N_Sb=2.23*10^17                 //No. of Sb atoms per cm^3
+N_Ge=8/V                              //No. of atoms of Ge 
 N=N_Sb/N_Ge
-disp(N,'No. of Antimony dopant atoms to be added to germanium(ppm)').
+disp(N,'No. of Antimony dopant atoms to be added to germanium(ppm)')