Author Question: What is the inductive reactance of a 20-mH inductor at a frequency of 60 Hz? A) 7.5 B) 0.13 ... (Read 52 times)

newbem · **on:** Jul 29, 2018

What is the inductive reactance of a 20-mH inductor at a frequency of 60 Hz?

A) 7.5
B) 0.13
C) 1.2
D) 1.2 m
E) 7.5 m

Question 2

A mass is oscillating on a spring with a period of 4.60 s. At t = 0 s the mass has zero speed and is at x = 8.30 cm. What is its speed at t = 2.50 s?

A) 10.9 cm/s
B) 3.06 cm/s
C) 3.32 cm/s
D) 1.80 cm/s
E) 0 cm/s