3. Electromagnetism and Optics

Magnetostatics — Quiz

Test your understanding of magnetostatics with 5 practice questions.

Practice Questions

Question 1

Which of the following expressions correctly represents the magnetic vector potential $ \mathbf{A} $ for a current density $ \mathbf{J} $ in magnetostatics?

Question 2

A long cylindrical conductor of radius $ R $ carries a uniform current density $ J $. What is the magnitude of the magnetic field $ B $ inside the conductor at a distance $ r < R $ from its axis?

Question 3

In a region where no currents are present, the magnetic field $ \mathbf{B} $ can be expressed as the gradient of a scalar magnetic potential $ \Phi_m $. Which of the following conditions must $ \Phi_m $ satisfy?

Question 4

A toroid with $ N $ turns has an inner radius $ a $ and an outer radius $ b $. If a current $ I $ flows through the windings, what is the magnitude of the magnetic field $ B $ inside the toroid at a distance $ r $ from the center, where $ a < r < b $?

Question 5

Which of the following statements accurately describes the behavior of magnetic susceptibility $ \chi_m $ for a diamagnetic material?