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diff --git a/620/CH19/EX19.3/example19_3.txt b/620/CH19/EX19.3/example19_3.txt
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+++ b/620/CH19/EX19.3/example19_3.txt
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+
+ Part a   
+ 
+ the time constant (in ms) of the circuit is   
+ 
+    20.  
+ 
+ Part b   
+ 
+ final value of the current (in mA) is   
+ 
+    50.  
+ 
+ Part c   
+ 
+ the initial rate of rise of current (in A/s) is   
+ 
+    2.5  
+ 
+ Part d   
+ 
+ time taken (in ms) to reach the final value of current is   
+ 
+    20.  
+\ No newline at end of file