The coaxial power cable has a central wire with radius 
centimeters. It is insulated from a surrounding shield with inside radius 
centimeters. The maximum voltage the
cable can withstand is called the breakdown voltage V of the insulation. V is given by the formula
?
?
where E is the dielectric strength of the insulation. If 
volts/centimeter, find V. Round your answer to the whole number.
?
?
A. 117,002 V
B. 2,452,253 V
C. 245,225 V
D. 169,378 V
E. 1,065,000 V
Answer: C
Mathematics
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