Question

A 0.50-m long solenoid consists of 1 000 turns of copper wire wound with a 4.0 cm radius. When the current in the solenoid is 18 A, the magnetic field at a point 1.0 cm from the central axis of the solenoid is:________

Answer 1

B = 4.52 10⁻² T

Step-by-step explanation:

A solenoid creates a magnetic field given by

B = μ₀ n i

Let's look for the density of turns in the solenoid length

n = N / l

n = 1000 / 0.50

n = 2000 turns / m

B = 4π 10⁻⁷ 2000 18

B = 4.52 10⁻² T

The magnetic field is uniform inside the solenoid