Question

Of the intervals shown (ignore the behavior at the end points of the intervals), determine the intervals in which $E_x$ has its least absolute value

• A. $ab$
  
• B. $bc$
  
• C. $cd$
  
• D. $de$
  

Answer 1

The correct option is C $cd$

The smallest absolute value of $E_x$ corresponds to the interval in which $V$ changes the least. From the graph, we see that this occurs in the interval $cd$, with $E_x=0$.