A circular coil lays flat on a horizontal table in a region where the magnetic field is straight down. The magnetic field is suddenly removed. When viewed from above, what is the direction of the current in the coil as the field is removed?
A. clockwise
B. clockwise initially, then counter-clockwise before going to zero
C. counter-clockwise
D. There is no induced current.
A. clockwise
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A ball is thrown upward with a speed and direction such that it reaches a maximum height of 16.0 m above the point it was released. At its maximum height it has a speed of 18.0 m/s. With what speed was the ball released?
A) 25.3 m/s B) 22.2 m/s C) 33.0 m/s D) 29.2 m/s E) 36.9 m/s
A hoop and a solid disk both have the same radius and mass and negligible thickness. Assume that they are both rotating with the same constant angular speed. Which has the higher rotational kinetic energy?
1.the hoop 2.the disk 3.They both have the same rotational kinetic energy. 4.impossible to determine
What is the net force on a 10-kg solid steel sphere falling in air at terminal speed?
a. 980 N b. 200 N c. 98 N d. 49 N e. Some value other than those given above.
A rectangular loop of wire of width 10 cm and length 20 cm has a current of 2.5 A flowing through it
Two sides of the loop are oriented parallel to a uniform magnetic field of strength 0.037 T, the other two sides being perpendicular to the magnetic field. The magnitude of the torque on the loop is A) 0.0093 m?N. B) 0.025 m?N. C) 0.050 m?N. D) 0.0019 m?N. E) 0.038 m?N.