Author Question: A solenoid of length l = 0.7 m and radius R = 5 cm stores an amount of energy U = 6 10-6 J when a ... (Read 97 times)

jman1234 · **on:** Jul 29, 2018

A solenoid of length l = 0.7 m and radius R = 5 cm stores an amount of energy U = 6 10-6 J when a current I = 0.4 A passes through it. What is the winding density of the solenoid?

A)

865 turns /m
B)

472 turns/m
C)

1078 turns/m
D)

104 turns/m
E)

327 turns /m

Question 2

The acceleration of gravity can vary locally on the Earth's surface because of the presence of rocks of different densities.

Indicate whether the statement is true or false