Which of the following is an acceptable description of the frequency of a transverse wave?
a. half the distance between the highest and lowest point
b. the distance between two consecutive compression
c. the number of complete cycles that occur in a second
d. the time required for consecutive highest points to pass a given point

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?