When measuring the Hall voltage, what happens to the reading when the current is increased 20%?
A. it increases 20%
B. it increases 40%
C. it increases 44%
D. it decreases 20%
E. it decreases 44%
A. it increases 20%
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In the double-slit experiment with light,
A) the impact point of each photon cannot be predicted, and neither can the overall pattern of impact points. B) the impact point of each photon cannot be predicted, but the overall pattern can be predicted. C) the impact point of each photon can be predicted, but the overall pattern of impact points cannot be predicted. D) the impact point of each photon can be predicted, and so can the overall pattern of impact points of a large number of photons.
Force on a Wire: A thin copper rod 1.0 m long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to balance the weight of the rod?
A. 1.2 A B. 2.5 A C. 4.9 A D. 9.8 A
A ten loop coil of area 0.23 m2 is in a 0.047 T uniform magnetic field oriented so that the maximum flux goes through the coil. This flux is
A) 3.4 × 10-2 Tm2. B) 1.1 × 10-3 Tm2. C) 3.4 × 10-1 Tm2. D) 1.1 × 10-2 Tm2. E) 1.1 × 10-1 Tm2.
A stretched string is observed to vibrate in three equal segments when driven by a 480-Hz oscillator. What is the fundamental frequency of vibration for this string?
a. 480 Hz b. 320 Hz c. 160 Hz d. 640 Hz e. 240 Hz