14. A 0.20 cm radius cylinder, 3.0 cm long, is wrapped with wire to form an inductor. At the interior is 5.0 mT the energy stored in the field is about: (A)0 (B)3.8×10⁻⁶ J (C)7.5×10⁻⁶ J (D)7.5×10⁻⁴ J (E)9.9 J

3. A spherical shell has inner radius R₁, outer radius R₂, and mass M, distributed uniformly throughout the shell. The magnitude of the gravitational force exerted on the shell by a point particle of mass m located a distance d from the center, outside the inner radius and inside the outer radius, is: (A)0 (B)GMm/d² (C)GMm/(R₂²-R₁³) (D)GMm(d³-R₁³)/d²(R₂³-R₁³) (E)GMm/(d²-R₁²)

14. A 0.20 cm radius cylinder, 3.0 cm long, is wrapped with wire to form an inductor. At the interior is 5.0 mT the energy stored in the field is about:
(A)0
(B)3.8×10⁻⁶ J
(C)7.5×10⁻⁶ J
(D)7.5×10⁻⁴ J
(E)9.9 J

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