A coil with a self-inductance of 0.75 mH experiences a constant ...

[roselinechinyere27m]

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.

[beccamahon]

Answer to Question 1

A

Answer to Question 2

C

[roselinechinyere27m]

Thanks for the timely response, appreciate it

[xiaomengxian]

Excellent