(a) The sliding bar in the figure has a length of 0.473 m and moves at 2.38 m/s in a magnetic field of magnitude 0.255 T. Using the concept of motional emf, find the induced voltage in the moving rod. V (b) If the resistance in the circuit is 0.395 N, find the current in the circuit and the power delivered to the resistor. (Note: The current, in this case, goes counterclockwise around the loop.) I = A P = W (c) Calculate the magnetic force on the bar. magnitude direction ---Select--- v (d) Use the concepts of work and power to calculate the applied force. N

(a) A lightning bolt produces a rapidly varying magnetic field. If the bolt strikes the earth vertically and acts like a current in a long straight wire, it will induce a voltage in a loop aligned like that in  23.57(b). What voltage is induced in a 1.00 m diameter loop 50.0 m from a 2.00×106 A lightning strike,if the current falls to zero in 25.0 μs ?                                                                  (b) Discuss circumstances under which such a voltage would producenoticeable consequences.

Shown below is a conducting rod that slides along metal rails. The apparatus is in a uniform magnetic field of strength 0.45 T, which is directly into the page. The rod is pulled to the right at a constant speed of 3 m/s by a force F. The only significant resistance in the circuit comes from the 2-0 resistor shown. (a) What is the voltage induced in the circuit? (b) What is the induced current? (c) What is the magnitude of F? (d) What are the power output of F and the power dissipated in the resistor? C B X X 2.0 Ω X X Hint X x X X x X X 4.0 cm x X Submit Question X X X X x X a. Voltage of b. An induced current of c. Force F of magnitude d. Force F does work at the rate of is dissipated in the resistor. X X X x V is induced. mA flows in counterclockwise direction. mN is needed to maintain the constant speed. mW; power of MacBook Pro Search or type URL mW

An airplane is flying due north at 720 km/h. The Earth’s magnetic field has a northward component of 0.020 mT and a downward component of 0.050 mT (Southern Indiana).  (a) If the wingspan (distance between wingtips) is 35 m, what is the motional emf between the wingtips? (b) Which wingtip has the higher electric potential?

Find the emf induced between the wingtips of a jet with a 67.8 m long wingspan, flying at v = 224 m/s northward in a region where Earth's magnetic field is B = 63.3 μT.

Shown below is a conducting rod that slides along metal rails. The apparatus is in a uniform magnetic field of strength 0.2 T, which is directly into the page. The rod is pulled to the right at a constant speed of 6 m/s by a force F. The only significant resistance in the circuit comes from the 2-Q resistor shown. (a) What is the voltage induced in the circuit? (b) What is the induced current? (c) What is the magnitude of F? (d) What are the power output of F and the power dissipated in the resistor? 2.0 2 4.0 cm Hint a. Voltage of is induced. b. An induced current of mA flows in Select an answer v direction. c. Force F of magnitude mN is needed to maintain the constant speed. d. Force F does work at the rate of mW; power of mW is dissipated in the resistor.

The figure below shows a top view of a bar that can slide on two frictionless rails. The resistor is R = 5.60 0, and a 2.50-T magnetic field is directed perpendicularly downward, into the page. Let { = 1.20 m. Bin R app (a) Calculate the applied force required to move the bar to the right at a constant speed of 2.30 m/s. N (to the right) (b) At what rate is energy delivered to the resistor? W

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

A circular coil of wire has radius 0.37 m, with 979 turns of wire in the coil. It is located in a magnetic field of 1.90 T, directed perpendicular to the plane of the loop. (a) What is the magnetic flux through the loop (in T m²)? (b) Now suppose the coil is attached to a 160 ohm resistor, and the magnetic field decreases to 0 in 1 second. What is the induced current in the circuit?

Consider A rod of length 40 cm moving with a velocity of 30 m/s to the left in a magnetic field of 0.2 T into the page. The loop has a small resistance of 2 ohms. Find a) the emf in the loop b) the magnitude and direction of induced current c) the magnetic force acting on the rod and its direction