The Space Between the Inner Wire of Radius a = $\kappa$

question 6

Multiple Choice

The space between the inner wire of radius a = 1 mm of a co-axial cable and the conducting shield of radius b = 8 mm is made of nylon ( $\kappa$ = 4.2) .A potential difference of 20 V is maintained between the wire and the shield.The energy stored per meter of the cable is

• A)1.12 nJ/m
• B)22.5 nJ/m
• C)44.9 nJ/m
• D)5.36 nJ/m
• E)2.68 nJ/m

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