A coil is wrapped with 300 turns of wire on the perimeter of a circular frame (radius = 8.0 cm). Each turn has the same area, equal to that of the frame. A uniform magnetic field is turned on perpendicular to the plane of the coil. This field changes at a constant rate from 20 to 80 mT in a time of 20 ms. What is the magnitude of the induced emf in the coil at the instant the magnetic field has a
magnitude of 50 mT?
a. 24 V
b. 18 V
c. 15 V
d. 10 V
e. 30 V
B
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vx is the velocity of a particle moving along the x axis as shown. If x = 2.0 m at t = 1.0 s, what is the position of the particle at t = 6.0 s?
?
?
A. ?2.0 m B. +2.0 m C. +1.0 m D. ?1.0 m E. 6.0 m
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a. kg m/s. b. g m/s2. c. kg m/s2. d. kg2/s.