Author Question: A long solenoid (1 500 turns/m) carries a current of 20 mA and has an inside diameter of 4.0 cm. A ... (Read 152 times)

cnetterville · **on:** Jul 28, 2018

A long solenoid (1 500 turns/m) carries a current of 20 mA and has an inside diameter of 4.0 cm. A long wire carries a current of 2.0 A along the axis of the solenoid. What is the magnitude of the magnetic field at a point that is inside the solenoid and 1.0 cm from the wire?
a. 78 mT
b. 55 mT
c. 48 mT
d. 68 mT
e. 2.0 mT

Question 2

A long solenoid (n = 1 200 turns/m, radius = 2.0 cm) has a current of a 0.30 A in its winding. A long wire carrying a current of 20 A is parallel to and 1.0 cm from the axis of the solenoid. What is the magnitude of the resulting magnetic field at a point on the axis of the solenoid?
a. 0.60 mT
b. 0.85 mT
c. 52 mT
d. 0.40 mT
e. 0.75 mT