Author Question: A coil with a self-inductance of 0.75 mH experiences a constant current buildup from zero to 15 A in ... (Read 81 times)

roselinechinyere27m · **on:** Jul 28, 2018

A coil with a self-inductance of 0.75 mH experiences a constant current buildup from zero to 15 A in 0.25 s. What is the induced emf during this interval?
a. 0.045 V
c. 0.030 V
b. 0.47 V
d. 0.019 V

Question 2

If the torsion constant of the suspension fiber in the Cavendish experiment were doubled, what would happen to the frequency of oscillation? The last two answers have been rounded to 2 significant figures.
a. It would double.
c. It would increase by a factor of 1.4.
b. It would halve.
d. It would decrease by a factor of 0.71.