Problem 8: In the arrangement shown in the figure, the resistor is 5.0 and a 4.0 T magnetic field is directed out of the paper. The separation between the rails is 3.0 m. Neglect the mass of the bar. An applied force moves the bar to the left at a constant speed of 2.0 m/s. Assume the bar and rails have negligible resistance and friction. Calculate the applied force required to move the bar to the left at a constant speed of 2.0 m/s. O 5Ω O O O 2 m/s O Om

An infinitely long wire carrying a 25-A current in the positive x-direction is placed along the x-axis in the vicinity of a 20-turn circular loop located in the x-y plane (see figure below). If the magnetic field at the center of the loop is zero, what is the direction and magnitude of the current flowing in the loop? Im d= 2 m Fig. P2: Circular loop next to a linear curent

A 0.200 kg metal rod carrying a current of 10.0 A glides on two horizontal rails 0.500 m apart. A vertical magnetic field keeps the rod moving at constant speed when the coefficient of kinetic friction between the rod and the rails is 0.100. Recall f = HgN. a. Sketch and annotate a relevant free-body diagram, showing the following forces: grav- ity, normal, friction, and magnetic. b. Find magnitude of the magnetic field.

A loudspeaker creates sound by pushing air back and forth with a paper cone that is driven by a magnetic force on a wire coil at the base of the cone. Figure shows the details. The cone is attached to a coil of wire that sits in the gap between the poles of a circular magnet. The 0.18 T magnetic field, which points radially outward from N to S, exerts a force on a current in the wire, moving the cone. The coil of wire that sits in this gap has a diameter of 5.0 cm, contains 20 turns of wire, and has a resistance of 8.0 Ω. The speaker is connected to an amplifier whose instantaneous output voltage of 6.0 V creates a clockwise current in the coil as seen from above. What is the magnetic force on the coil at this instant?

A magnetic field of 8.1 T passes through a single loop square coil of side length 4.4 x 10-2 m which makes 59.7° angle with the area vector of the coil. Find the magnetic flux associated with the coil in Wb/m²? O a. 0.015682 O b. 0.007912 O c. 0.024843 O d. 0.791180

1- Read the Vectors Section of Chapter 3 of the PHYS 201 text book (Physics by Giancoli). In the Figure below a vector and its components are shown. Write down the expression of the components Ax, and Ay in term of the magnitude A and the angle 0. Also write the expressions of the magnitude of the vector A and the angle 0 in terms of the components Ax, and Ay. A, A,

An electric circuit made from two resistors R1 and R2 is put in a perpendicular and homogeneous magnetic field B. A third resistor r on a thinand conducting rod is moving with a constant velocity v across the parallel wires of the circuit (See the figure!). Calculate the current of each resistor. Thecontacts between the rod and wires are perfect.

The figure below shows a top view of a bar that can slide on two frictionless rails. The resistor is R = 5.80 Ω, and a 2.50-T magnetic field is directed perpendicularly downward, into the page. Let ℓ = 1.20 m. Calculate the applied force required to move the bar to the right at a constant speed of 70m/s. At what rate is energy delivered to the resistor?

The figure below shows a top view of a bar that can slide on two frictionless rails. The resistor is R = 6.60 N, and a 2.50-T magnetic field is directed perpendicularly downward, into the page. Let l = 1.20 m. Bin R É. app (a) Calculate the applied force required to move the bar to the right at a constant speed of 2.10 m/s. N (to the right) (b) At what rate is energy delivered to the resistor? W

Calculate the magnitude of the magnetic field in (Tesla) at a point 13.3 cm from a long, thin conductor carrying a current of 1.03 A