A hollow cylindrical (inner radius = 2.0 mm, outer radius = 4.0 mm) conductor carries a current of 24 A parallel to its axis. This current is uniformly distributed over a cross section of the conductor. Determine the magnitude of the magnetic field at a point that is 5.0 mm from the axis of the conductor
a. 0.96 mT
b. 1.7 mT
c. 0.55 mT
d. 1.2 mT
e. 0.40 mT
A
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a. 3.7 rad/s2 b. 1.3 rad/s2 c. 2.5 rad/s2 d. 4.9 rad/s2 e. 1.9 rad/s2
Compared to a smaller-objective lens, a larger-objective lens makes a star's image
a. brighter. b. dimmer. c. no effect.
The mixing of light of all visible colors results in ________ light.
A. white B. visible C. Sun D. spectral E. brown
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