A flat conductor of thickness 0.500 mm is placed in a magnetic field of 0.200 T perpendicular to the flat surface. If there are 
charge carriers (i.e., electrons) per m3, what is the Hall voltage generated when 3.40 A flows along the conductor?
A. 0.266 mV
B. 0.531 mV
C. 0.797 mV
D. 1.06 mV
E. 2.12 mV
D. 1.06 mV
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A sound source emits 30.0 W of sound power spread equally in all directions. What is the sound intensity level 30.0 m from the source?
A) 94.2 dB B) 83.2 dB C) 2.65 × 10-3 dB D) 2.65 × 10-3 W E) -25.8 dB
Which of the following is true of a first principle?
A) It is something that seems obviously true and needs no further examination. B) It is something that is obviously false and needs no further examination. C) It is something that is false but appears true without proper examination. D) It is something that is true but needs a lot of examination to be proven true.
Wave Characteristics: Which one of the following is not an electromagnetic wave?
A. ultraviolet B. infrared C. radio waves D. sound waves E. gamma rays
Suppose that we double the electrical power flowing into the filament of an incandescent bulb. By what factor will the most probable photon energy ? p increase?
A. 2 1/4 B. 21/3 C. 21/2 D. 2 E. 4 F. 8 T. 16