An air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of 50 mm and 73 mm. The electric potential of the inner conductor with respect to the outer conductor is -434 V (k = 1/4πε 0 = 8.99 × 109 N · m2/C2) The maximum energy density of the capacitor is closest to
7.8×10−3 J/m3.
1.8×10−4 J/m3.
5.9×10−4 J/m3.
1.6×10−3 J/m3.
7.8×10−4 J/m3.

Question

An air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of 50 mm and 73 mm. The electric potential of the inner conductor with respect to the outer conductor is -434 V (k = 1/4πε 0 = 8.99 × 109 N · m2/C2) The maximum energy density of the capacitor is closest to
        7.8×10−3 J/m3.
	1.8×10−4 J/m3.
	5.9×10−4 J/m3.
	1.6×10−3 J/m3.
	7.8×10−4 J/m3.