18. Faraday's law states that an induced emf is proportional to: (A)the rate of change of the magnetic field (B)the rate of change of the electric field (C)the rate of change of the magnetic flux (D)the rate of change of the electric flux (E)zero

5. A solid wheel with mass M, radius R, and rotational inertia MR²/2, rolls without sliding on a horizontal surface. A horizontal force F is applied to the axle and the center of mass has an acceleration a. The magnitudes of the applied force F and the frictional force f of the surface, respectively, are: (A)F = Ma, f = 0 (B)F = Ma, f = Ma/2 (C)F = 2Ma, f = Ma (D)F = 2Ma, f = Ma/2 (E)F = 3Ma/2, f = Ma/2

18. Faraday's law states that an induced emf is proportional to:
(A)the rate of change of the magnetic field
(B)the rate of change of the electric field
(C)the rate of change of the magnetic flux
(D)the rate of change of the electric flux
(E)zero

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