In the figure below, a metal bar sitting on two parallel conducting rails, connected to each other by a resistor, is pulled to the right with a constant force of magnitude Fann = 1.45 N. The friction between the bar and rails negligible. The resistance R = 8.00 n, the bar is moving at a constant speed of 2.25 m/s, the distance between the rails is €, and a uniform magnetic field B is directed into the page. (a) What is the current through the resistor (in A)? A. (b) If the magnitude of the magnetic field is 2.60 T, what is the length { (in m)? m (c) What is the rate at which energy is delivered to the resistor (in W)?

A coil of wire with N = 198 turns sits with its normal parallel to a B = 0.596 T magnetic field. The coil has a radius of r = 0.0439 m. If the coil experiences a torque of τ = 0.809 N·m, how much current (I) runs through the coil?

A solid conducting bar is free to move across two ends of a conducting U shape of wire that are separated by L=25 cm. On the base of the U shape is a resistor R=20 ohms. The whole apparatus is in a constant magnetic field B=0.7 T pointing out of the page. If the conducting bar has negligent resistance itself and is moved to the right at a constant velocity of 12 m/s, what is the magnitude and direction of the current induced in the loop? a) 0.11 A, clockwise b) 0.11 A, counterclockwise c) 2.1 A, clockwise d) 2.1 A, counterclockwise

A loop of wire with radius r= 0.183 m is in a magnetic field of magnitude B as shown in the figure. The magnetic field is perpendicular to the plane of the loop. B changes from B1= 0.22 T to B2= 7.5 T in Δt = 7.5 s at a constant rate. (a)  Express the magnetic flux Φ going through a loop of radius r assuming a constant magnetic field B.  (b)  Express the change in the magnetic flux going through this loop, ΔΦ, in terms of B1, B2 and r.  (c) Express the magnitude of the average induced electric field, E, induced in the loop in terms of ΔΦ, r and Δt.

In the figure below, an iron bar sitting on two parallel copper rails, connected to each other by a resistor, is pulled to the right at a constant speed. The resistance R = 7.00 n, the distance between the rails is { = 1.20 m, and a uniform 3.10 T magnetic field is directed into the page. At what speed (in m/s) should the bar be moved to produce a current of 0.500 A in the resistor? m/s

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In the figure below, an iron bar sitting on two parallel copper rails, connected to each other by a resistor, is pulled to the right at a constant speed. The resistance R = 5.00 0, the distance between the rails is { = 1.20 m, and a uniform 3.10 T magnetic field is directed into the page. At what speed (in m/s) should the bar be moved to produce a current of 0.500 A in the resistor? Fapp m/s

The figure below shows a top view of a bar that can slide on two frictionless rails. The resistor is R = 5.00 N, and a 2.50-T magnetic field is directed perpendicularly downward, into the page. Let l = 1.20 m. x Pin B, R app (a) Calculate the applied force required to move the bar to the right at a constant speed of 1.70 m/s. 3.06 N (to the right) (b) At what rate is energy delivered to the resistor? 5.202 W Need Help? Read It Master It xx x x x x x x × x x x x × × X X X x X X X

In the figure below, an iron bar sitting on two parallel copper rails, connected to each other by a resistor, is pulled to the right with a constant force of magnitude F = 1.25 N. The friction between the bar and rails is negligible. The resistance R = 8.00 02, the bar is moving at a app constant speed of 2.25 m/s, the distance between the rails is e, and a uniform magnetic field B is directed into the page. R i (a) What is the current through the resistor (in A)? 0.5929 A Fapp (b) If the magnitude of the magnetic field is 2.60 T, what is the length / (in m)? 0.81 m (c) What is the rate at which energy is delivered to the resistor (in W)? 2.812 ✓ W (d) What is the mechanical power delivered by the applied constant force (in W)? W What If? Suppose the magnetic field has an initial value of 2.60 T at time t = 0 and increases at a constant rate of 0.500 T/s. The bar starts at an initial position x = 0.100 m to the right of the resistor at t = 0, and again moves at a constant speed of 2.25…