Parallel-Plate Capacitor: Each plate of an ideal air-filled parallel-plate capacitor has an area of 0.0010 m2, and the separation of the plates is 0.050 mm. An electric field of 7.4 × 106 V/m is present between the plates. What is the capacitance of this capacitor? (?0 = 8.85 × 10-12 C2/N ? m2)
A. 180 pF
B. 120 pF
C. 300 pF
D. 240 pF
E. 360 pF
Answer: A
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Choose the correct statement
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Two spheres are made of conducting material. Sphere #2 has twice the radius of Sphere #1. What is the ratio of the capacitance of Sphere #2 to the capacitance of Sphere #1?
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A beam of light of two different wavelengths enters a pane of glass 3.00 mm thick at an angle of incidence of 56°. The indices of refraction for the two different colors are 1.514 and 1.528
Because of dispersion, the colored beams, although parallel, are separated by a small distance. How far apart are they? A) 0.057 mm B) 0.0083 mm C) 0.025 mm D) 0.014 mm E) 0.0062 mm