A generator has a coil with 1260 turns that are each 0.020 m in diameter. The coil rotates at 3600 rpm in a 0.670 T magnetic field. If a 20.0 Ω resistive load is connected in parallel with the generator, what is the average power used by the load?   ____ W

In each of two coils the rate of change of the magnetic flux in a single loop is the same. The emf induced in coil 1, which has 245 loops, is 2.51 V. The emf induced in coil 2 is 4.90 V. How many loops does coil 2 have? Number i Units

Suppose that the light bulb in Figure 22.4b is a 60.0-W bulb with a resistance of 214 Ω. The magnetic field has a magnitude of 0.603 T, and the length of the rod is 0.603 m. The only resistance in the circuit is that due to the bulb. What is the shortest distance along the rails that the rod would have to slide for the bulb to remain lit for one-half second?

The solenoid shown in the diagram has 5 loops per centimeter and a cross sectional area of 0.3 m². The resistor has the resistance of 2 Ohm. When the switch is closed, the current in the solenoid increases at the rate of 200 A/s. Find the current through the resistor. R

A current I flows around the rectangular loop shown in the accompanying figure. B A D Write expressions for B . dl for the paths A, B , C and D A: B: C: D:

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.

The energy stored in a solenoid inductor is 28.4 mJ. The solenoid has 425 turns, is .876 meters long and has a diameter of 37.2 cm. How much current is flowing through the solenoid inductor? A. 1.00 A B. 2.02 A C. 4.68 A D. .225 A E. 1.42 A

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 >

A conducting bar sits on top of two parallel rails. A uniform magnetic field B is steady and directed to the right. The bar moves upward with velocity v. What is the polarity of the induced emf in terminals X and Y? X Y O X and Y are at the same potential. X is positive and Y is negative. O Y is positive and X is negative. 1-1

A voltage generated by moving a magnet in a coil of wire is called "induced voltage." True O False