A single loop of wire with an area of 0.0920 m2 is in a uniform magnetic field that has an initial value of 3.80 T, is perpendicular to the plane of the loop, and is decreasing at a constant rate of 0.140 T/s.  What emf is induced in this loop?  If the loop has a resistance of 0.550 ohms, find the current induced in the loop.

A wind turbine generator contains a circular coil that is rotated fully through a 100-turn cycle. If the average emf over 10 seconds equals 153 V, with magnetic field strength of 4.00 T, what would be the radius of the coil in meters?

A circular wire coil with 25 turns and radius 1.02 cm is placed in a uniform magnetic field of strength 6.04 T, directed perpendicular to the plane of the wire loops. Over a period of 1.85 s, the magnetic field fades away to zero. What is the average induced emf (voltage) in the coil over this period of time?     0.016 V     0.035 V     0.043 V     0.027 V

An array of solar panels produces 8.65 A of direct current at a potential difference of 148 V. The current flows into an inverter that produces 60-Hz alternating current with Vmax = 84.8 V and Imax = 14.7 A. What is the power efficiency of the converter? O 48.7% O 97.4% O 68.9% O 205%

Two coils are placed close together in a physics lab to demonstrate Faraday's law of induction. A current of 9.00 A in one is switched off in 1.60 ms, inducing a 6.00 V emf in the other. What is their mutual inductance (in mH)?

An intrepid physics student transports a loop of wire from their hometown all the way to Earth's north magnetic pole. The loop has a radius ofr = 50 cm and a total resistance 75 m2, and the plane of the loop is held parallel to the ground at all times. In their hometown, Earth's magnetic 35 µT and points slightly into the ground, making an angle of 0 = 15° with a line that points due north. At the north magnetic pole, Earth's magnetic field 60 µT and points directly into the ground. If the student completed this journey over the course 48 hours, then what was the average current induced in the loop? Provide both the magnitude and direction of the current (as viewed from above the loop), and include a sketch of the "initial" and "final" configurations as part of of R field has a magnitude of B; has a magnitude of Bf of t your representation.

During a 74-ms interval, a change in the current in a primary coil occurs. This change leads to the appearance of a 6.6-mA current in a nearby secondary coil. The secondary coil is part of a circuit in which the resistance is 12 Q. The mutual inductance between the two coils is 3.2 mH. What is the change in the primary current? Alp=

A loop of wire enclosing an area of 0.09m2 has a magnetic field passing through its plane at an angle to the plane. The component of the field perpendicular to the plane is 0.12 T, and the component parallel to the plane is 0.05 T. What is the magnetic Flux through this coil? The magnetic Flux through the coil is _____T•m2.

A large power plant generates electricity at 12.0 kV. Its old transformer once converted the voltage to 360 kV. The secondary coil of this transformer is being replaced so that its output can be 770 kV for more efficient cross-country transmission on upgraded transmission lines.Randomized Variables V1 = 360 kVV2 = 770 kV a) What is the ratio of turns in the new secondary to the number of turns in the old secondary?  b) What is the ratio of new current output to the old current output for the same power input to the transformer?  c) If the upgraded transmission lines have the same resistance as the original ones, what is the ratio of new line power loss to the old?

Problem 28.15 ▼ A long pair of insulated wires serves to conduct 27.5 A of dc current to and from an instrument. A third wire is placed in the plane of the two wires shown in the figure parallel and just to the right. Part A Fear Incar If it carries 24.2 A upward, what force per meter of length does it exert on each of the other two wires? Assume it is 2.8 mm from the nearest wire, center to center. Express your answer to two significant figures and include the appropriate units. Submit ▾ Part B Flor lfar Submit HA Provide Feedback Value Request Answer 1 Express your answer to two significant figures and include the appropriate units. HA Value Request Answer www Units ? Units SOME ? Constants | Periodic Table 4 of 5 2.8 mm Next >