An AC generator consists of 6 turns of wire. Each turn has an area of 0.040 m2 . The loop rotates in a uniform field (B = 0.20 T) at a constant frequency of 50 Hz. What is the maximum induced emf?
a. 13 V
b. 2.4 V
c. 3.0 V
d. 15 V
e. 4.8 V
d
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A vertical tube one meter long is open at the top. It is filled with 75 cm of water. If the velocity of sound is 344 m/s, what will the fundamental resonant frequency be (in Hz)?
A. 3.4 B. 172 C. 344 D. 1.7 E. 688
The right image was obtained when only part of Io was in sunlight. Based on the colors, which part of the surface was in sunlight?
A) the left side B) the right side C) only the peaks of the volcanoes
Direct detection of an extrasolar planet means ________
A) seeing the planet with the naked eye B) acquiring images or spectra of the planet C) observing the planet's effect on its host star D) sending a space probe to the planet
A 5.0-nC point charge is embedded at the center of a nonconducting sphere (radius = 2.0 cm) which has a charge of -8.0 nC distributed uniformly throughout its volume. What is the magnitude of the electric field at a point that is 1.0 cm from the center of the sphere?
a. 1.8 × 10^5 N/C b. 9.0 × 10^4 N/C c. 3.6 × 10^5 N/C d. 2.7 × 10^5 N/C e. 7.2 × 10^5 N/C