Author Question: Two loops of wire are arranged so that a changing current in one, the primary, will induce a current ... (Read 139 times)

Deast7027 · **on:** Jul 28, 2018

Two loops of wire are arranged so that a changing current in one, the primary, will induce a current in the other, the secondary. The secondary loop has twice as many turns as the primary loop. The current in the primary at this moment is 6 A and increasing. The current in the secondary must be:
a. 3 A.
b. 6 A.
c. zero.
d. There is insufficient information to work this problem.

Question 2

If the frequency of a traveling wave train is increased by a factor of four in a medium where the speed is constant, which of the following is the result?
a. amplitude is one fourth as big
c. wavelength is quadrupled
b. amplitude is quadrupled
d. wavelength is one fourth as big