All questions
AP Physics C: E&M
12.2 Magnetism and Moving Charges
IntermediateMCQMathematicalConceptual19.3k
Square current loop in a uniform magnetic field with two candidate axes of rotation.
Square current loop in a uniform magnetic field with two candidate axes of rotation.
A rigid square loop of side length \(L\) lies flat in the \(xy\)-plane and carries a steady counterclockwise current \(I\). A uniform magnetic field \(\vec{B} = B_0 \hat{i}\) points in the positive \(x\)-direction across the plane of the loop. Axis 1 lies along the line \(x = 0\) (passing through the center of the loop), and Axis 2 lies along the line \(x = -\dfrac{L}{2}\) (passing through the left edge of the loop), with both axes parallel to the \(y\)-axis. Which of the following correctly compares the magnitudes of the net magnetic torque about Axis 1 (\(\tau_1\)) and Axis 2 (\(\tau_2\)), and provides the correct physical justification?

Log In to Continue

Accounts are free! Log in to try this question, see explanations, save progress, and more!

Tools for a 5