A charge Q is spread uniformly along the circumference of a circle of radius R. A point particle with charge q is placed at the center of this circle. The total force exerted on the particle q can be calculated by Coulomb's law:
A) if you use R for the distance
B) if you use 2R for the distance
C) if you use 2?R for the distance
D) and the result of the calculation is zero
E) none of the above
D) and the result of the calculation is zero
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What will be an ideal response?
The length of a telescope is 2.00 m and the focal length of the objective lens is 2.0 cm. What is the focal length of the eyepiece?
A) 200 cm B) 202 cm C) 101 cm D) 2.0 cm E) 198 cm
Light with a wavelength of 450 nm shines through a lens with an aperture diameter of 0.85 cm. Use Rayleigh's criterion to determine the limiting angle of resolution. (1 nm = 10-9 m)
a. 6.5 × 10^-5 rad c. 9.2 × 10^-5 rad b. 1.3 × 10^-4 rad d. 3.0 × 10^-9 rad
When uranium emits a beta particle, the result is
A) a uranium ion. B) a different isotope of uranium. C) the first transuranic element. D) all of the above E) none of the above