Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.

In this lesson, we will learn how to use Ampere's law to relate the current through a closed conducting path to the magnetic field produced by that current.

Q1:

The following figure shows a rectangular current loop that carries a current I.

Evaluate ⋅ B I d in terms of 𝜇 0 and I for path A.

Evaluate ⋅ B I d in terms of 𝜇 0 and I for path B.

Evaluate ⋅ B I d in terms of 𝜇 0 and I for path C.

Evaluate ⋅ B I d in terms of 𝜇 0 and I for path D.

Q2:

A nonconducting hard rubber circular disk is painted with a uniform surface charge density. The disk radius is 20.00 cm, and its height is 2.00 cm. The angular speed of the disk’s rotation is 400 rad/s and the charge density on the disk is 1.00 C/m^{2}. Find the magnitude of the magnetic field produced by the disk.

Q3:

Use Ampere’s law to evaluate ⋅ B l d for the current configurations and paths shown in each of the following figures.

Don’t have an account? Sign Up