Figure 3
The horizontal axis is labeled “Speed U (kilometer per hour)” and ranges from 0 to 500 in increments of 100 units. The vertical axis is labeled “Critical background field E superscript critical subscript infinity (multiplied by 10 to the power 5 Volt per meter)” and ranges from 6.100 to 6.130 in increments of 0.005 units. The line graph consists of a single solid line with circular markers. The data is as follows: The line begins at (0, 6.131 multiplied by 10 to the power 5), then remains nearly stable as it passes through (100, 6.130 multiplied by 10 to the power 5) and (200, 6.130 multiplied by 10 to the power 5), then decreases downwards as it passes through (300, 6.125 multiplied by 10 to the power 5) and (400, 6.122 multiplied by 10 to the power 5), and finally terminates at (500, 6.101 multiplied by 10 to the power 5). Note: All the numerical data values are approximated.Variation of the train-wise critical background field with operating speed. Source(s): Authors' own work