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A Rowland ring of mean radius 15 cm has 3500 turns of wire wound on a ferromagnetic core of relative permeability 800. What is the magnetic field B in the core for a magnetising current of 1.2 A?
A long solenoid (cross-sectional area = 0.85 x 10-6 m2, number of turns per unit length = 1878 turns/m) is bent into a circular shape so it looks like a doughnut, Find the emf induced in the toroid
The resistance of a bagel toaster is 14 ?. To prepare a bagel, the toaster is operated for one minute from a 120-V outlet. How much energy is delivered to the toaster
The mass of a copper atom is 1.54 10-25 kg, and the density of copper is 8 920 kg/m3. Find the edge dimension of each cube
A small rocket to gather weather data is launched straight up. few seconds into the flight, its velocity is 110 and it is accelerating at 17 . At this instant, the rocket's mass is 50 and it is losing mass at the rate of 0.45 as it burns fuel.
Illustrate what is the average emf that is induced in this coil if it is in a region where B=2.0 T upward, and the coil's plane is perpendicular to B?
The Crab Pulsar, location inside the Crab Nebula in the constellation Orion, has a period currently of length 33.085 ms. Itis estimated to have an equatorial radius of 15 km.
The coefficient of performance of a refrigerator is 3.4. The compressor uses 20 J of energy per cycle. How much heat energy is exhausted per cycle
A 3.1 micro Coulomb charge hangs from a string midway between two sheets and makes an angle of 10 degrees with the vertical, what is the tension in the cord
If the radius of the earth is located 44 degrees North Latitude, what distance does the earth move in one hour
Suppose you're skiing up a 20m tall slope at the indicated angle of inclination. What minimum initial speed must you have at the bottom to just make it to the top
Two girls decide to jump off a diving board. Katherine steps off the diving board. Anna runs straight off the diving board so that her initial velocity is solely horizontal. They both leave the diving board at the same time. Which one lands in the..
A long straight wire suspended in the air carries a conventional current of 8.2 amperes in the ?x direction, What is the (vector) magnetic field due to the wire at the location of the electron
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