Author Question: An electric field of 4.0 mV/m is induced at a point 2.0 cm from the axis of a long solenoid (radius ... (Read 81 times)

mydiamond · **on:** Jul 28, 2018

An electric field of 4.0 mV/m is induced at a point 2.0 cm from the axis of a long solenoid (radius = 3.0 cm, 800 turns/m). At what rate is the current in the solenoid changing at this instant?
a. 0.50 A/s
b. 0.40 A/s
c. 0.60 A/s
d. 0.70 A/s
e. 0.27 A/s

Question 2

A long solenoid has a radius of 4.0 cm and has 800 turns/m. If the current in the solenoid is increasing at the rate of 3.0 A/s, what is the magnitude of the induced electric field at a point 2.2 cm from the axis of the solenoid?
a. 3.3 10-5 V/m
b. 3.6 10-5 V/m
c. 3.9 10-5 V/m
d. 4.2 10-5 V/m
e. 6.0 10-5 V/m