Electromagnetic induction is employed in
A) electric power lines.
B) triggering traffic lights.
C) hybrid automobiles.
D) mobile phones.
E) all the above
Answer: E
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A conducting rectangular loop of mass M, resistance R, and dimensions a×b is allowed to fall from rest through a uniform magnetic field which is perpendicular to the plane of the loop. The loop accelerates until it reaches a terminal speed (before the upper end enters the magnetic field). If a = 2.0 m, B = 6.0 T, R = 40 ?, and M = 0.60 kg, what is the terminal speed?
A. 1.6 m/s B. 20 m/s C. 2.2 m/s D. 26 m/s E. 5.3 m/s
The Earth is about 150 million km from the Sun, and the apparent brightness of the Sun in our sky is about 1,300 watts per square meter
Determine the apparent brightness we would measure for the Sun if we were located half the earth's distance from the Sun.
Rank the following media in order according to the speed of light in them, from slowest to fastest: vacuum, air, water and glass
a. air, water, glass, vacuum b. glass, air, water, vacuum c. water, glass, air, vacuum d. glass, water, air, vacuum e. none of the above
List at least one naked-eye observation that is consistent with the ancient idea that Earth is at the center of the Milky Way. List at least one naked-eye observation that is inconsistent with the notion that Earth is at the center of the Milky Way
What will be an ideal response?