BDL. Shown are 3 integration paths shaped like letters B, D, and L with enclosed identical currents with directions shown. What is the correct order of their line integral ?

May butas. A conducting tube with inner radius and outer radius is carrying a current of out of the page that is uniformly distributed along its cross-sectional area. What is the magnetic field at region ? Use a clockwise Amperean loop.

Concentrix. Consider two concentric circular loops of radius and , respectively, lying in the -plane. Each loop carries a current moving in the directions shown. What is the magnitude of the net magnetic field at point at distance from the center of the loops?

Singkil. Consider four long, straight, parallel wires arranged in the corners of a 20.0 [cm] square and are carrying currents directed as shown in the figure. The into the page currents are 5.0 [A], while the out of the page currents are 2.5 [A]. What is the magnitude and direction of at point , the center of the square?

Two lanes. Consider two current-carrying wires shown in the figure. The top wire at is carrying a current to the right and contains a charge element of width at . The bottom wire at is carrying a current to the left and contains a charge element of width at . What is the net magnetic field at due to these charge elements?

Stability Check. Consider a circular loop shown which carry current in the direction indicated. If the loop is in a uniform magnetic field in the -direction, which of the following statements is/are TRUE about the loop?

I. The loop is in stable equilibrium.

II. The loop is in unstable equilibrium.

III. The loop experiences no torque.

Scattering charges. The figure shows a system of three electrons moving at velocities and a proton moving at velocity as shown. All charges are in the plane of the page (xy-plane). What is the magnitude and direction of the net magnetic field at point ?

B-I-N-I-verse. A wire, bent as shown, is immersed in a uniform magnetic field 2.50 [T] directed to the right. The vertical segments are 1 [m] long while the diagonal segment is [m]. Current 4.00 [A] flows in the direction shown. What is the net force on the wire?

Loop-in. A loop carries a current as shown and is immersed in a uniform magnetic field . What is the direction of the torque on the loop?

Tira! Consider the paths of two particles and of the same mass and with initial velocity . The particles enter a region of uniform magnetic field as shown in the figure. Given the trajectories of the particles, which of the following statements is TRUE about the charge of the particles?