A circular coil of copper wire is lying flat on a horizontal table. A bar magnet is held above the center of the coil with its south pole downward. The magnet is released from rest and falls toward the coil
As viewed from above, what is the direction of the current induced in the coil as the magnet approaches the coil? A) counterclockwise
B) clockwise
C) No current is induced in the coil.
D) An emf but no current is induced in the coil.
B
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A certain aircraft has a mass of 300,000 kg. At a certain instant during its landing, its speed is 27.0 m/s. If the braking force is a constant 445,000 N, what is the speed of the airplane 10.0 s later?
A) 10.0 m/s B) 12.2 m/s C) 14.0 m/s D) 18.0 m/s E) 20.0 m/s
The square of the wave function represents the
A) position of the particle. B) velocity of the particle. C) probability of finding the particle. D) position of the particle as a function of time. E) probability density for finding particle.
A box sliding on a frictionless flat surface runs into a fixed spring, which compresses a distance x to stop the box. If the initial speed of the box were doubled, how much would the spring compress in this case?
a) half as much b) the same amount c) ? 2 times as much d) twice as much e) four times as much
Characteristic peaks occur in an x ray spectrum of an atom because electrons in the atom make transitions to lower energy levels after being bombarded with high energy electrons
Indicate whether the statement is true or false