It takes 10 J of work to push a charge initially at rest into an electric field. If the charge is then released, it flies back to its initial position with a kinetic energy of
A) zero.
B) 5 J.
C) 10 J.
D) more than 10 J.
E) need more information.
Answer: C
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Which of these particles has the least mass?
a. electron neutrino b. muon c. electron d. pion
A very large sheet of a conductor carries a uniform charge density of 4.00 pC/mm2 on its surfaces. What is the electric field strength 3.00 mm outside the surface of the conductor? (?0 = 8.85 × 10-12 C2/N ? m2)
A) 4.52 × 105 N/C B) 2.26 × 105 N/C C) 9.04 × 105 N/C D) 0.226 N/C E) 0.452 N/C
State Kirchhoff's junction rule
What will be an ideal response?
A lens is designed to work in the visible, near-infrared, and near-ultraviolet. The best resolution of this lens from a diffraction standpoint is
A) in the near-infrared. B) the same for all wavelengths. C) in the near-ultraviolet. D) indeterminate. E) in the visible.