A rectangular wire loop (length = 60 cm, width = 40 cm) lies completely within a perpendicular and uniform magnetic field of magnitude of 0.5 T. If the length of the loop starts increasing at a rate of 20 mm/s at time t = 0, while the width is decreasing at the same rate, what is the magnitude of the induced emf at time t = 4.0 s?
A. 6.8 mV
B. 5.2 mV
C. 3.6 mV
D. 8.4 mV
E. 10 mV
Answer: C
You might also like to view...
Which of the following best explains why an interstellar ramjet could, in theory, achieve continuous acceleration?
A) It uses fuel that is more efficient than any other known fuel. B) It collects its fuel as it goes, rather than having to carry the weight of fuel along with it. C) It takes advantage of theoretically possible loopholes in Einstein's theory of relativity. D) It has such a large fuel tank that it will essentially never use up all the fuel it carries. E) Its speed always gets faster because time dilation changes the rate at which time flows.
Do you think it is possible that a flare star could harbor an advanced civilization? Explain your reasoning
What will be an ideal response?
A melon is tossed straight upward with 100 J of kinetic energy. If air resistance is negligible the melon will return to its initial level with a kinetic energy of
A) less than 100 J. B) more than 100 J. C) 100 J. D) need more information
A projectile is fired from ground level at an angle of 40.0° above horizontal at a speed of 30.0 m/s. What is the speed of the projectile when it has reached a height equal to 0.500 of its maximum height?
A) 26.0 B) 27.4 C) 28.7 D) 26.7 E) 28.1