An electrical engineer constructs a cylindrical solenoid of area 6 cm2 and length 20 cm from 160 m of thin wire. The wire will handle a maximum current of 60 mA.
(a) What is the inductance of the solenoid?
_________mH
(b) How much energy can the inductor store?
__________ J
c)In an RL circuit connected to a 12 V battery at time t = 0, the current is measured to be 0.2 A after 1.4 10-4 s, and 0.34 A after 10 s. What are the values of R and L?
R________ohms
L_________ mH