56. For quantum model, E = hν = hc / λ, where E is photon energy in unit of eV, h is the Planck’s constant ( ), ν is the frequency (s -1 ), λ is the wavelength in meters (m), then E✖λ (eV m) is: (A) 1.24 ✖10- 3 (B) 1.24✖ 10- 4 (C) 1.24 ✖10-5 (D) 1.24✖ 10- 6 (E) 1.24✖ 10-7

54. The following shows a rod of length L = 10.0 cm that is forced to move at constant speed v = 5.00 m/s along horizontal rails. The rod, rails, and connecting strip at the right form a conducting loop. The rod has resistance 0.400 Ω; the rest of the loop has negligible resistance. A current i = 100 A through the long straight wire at distance a = 10.0 mm from the loop sets up a (nonuniform) magnetic field through the loop. Find the emf. (μ0 = 4π10-7 T  m/A, ln 2 = 0.693, ln 10 = 2.303, ln 11 = 2.398) (A) 2.4✖10-4 V (B) 5.8✖10-3 V (C) 4.8✖10-5 V (D) 3.9✖10-4 V (E) 8.8✖10-4 V

56. For quantum model, E = hν = hc / λ, where E is photon energy in unit of eV, h is the Planck’s constant ( ), ν is the frequency (s -1 ), λ is the wavelength in meters (m), then E✖λ (eV m) is: (A) 1.24 ✖10- 3 (B) 1.24✖ 10- 4 (C) 1.24 ✖10-5 (D) 1.24✖ 10- 6 (E) 1.24✖ 10-7

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