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These are non-metallic compounds consisting of ferric oxide and one or two bivalent metal oxides such as NiO, MnO. These have resistivity of the order of 109O cm, which reduces eddy current losses at high frequency. These magnets made out of it have high coercive force and square hysteresis loop. Magnetic permeability for these may be as high as 10,000 to 30,000. These materials are fabricated into shapes, such as triodes, E, U, I, beads and self shielding pot cores.
APPLICATIONS: CORES MADE OF ITS find use in filter applications up to 1MHz, high frequency power transformer operating at 10 to 100 KHz, pulse transforms up to 100MHz, adjustable air gap inductors recording heads and transducers.
find time period and frequency of vibration of water level in a limb of manometer executing simple harmonic vibrations
Avogadro's hypothesis (Count A. Avogadro; 1811) At the same temperature and pressure, equal volumes of all of the gases contain equal numbers of molecules. In fact, it is, only
Q. Show the use of Fire extinguisher? Ans: a) Pull the pin at the top of the extinguisher. b) Aim the nozzle towards the base of the fire. c) Stand approximately 8
Black-hole dynamic laws; laws of black-hole dynamics first law of black hole dynamics For interactions among black holes & normal matter, the conservation laws of mass-
A sprinter runs 100.0 m. If he travels at constant acceleration of 1.95 m/s2 for the first 6.00 s, and then at constant velocity for the remaining time, what was his average veloci
Use Thévenin's theorem to find the current ?owing in the 14Ω resistor of the network shown in Figure. Find also the power dissipated in the 14Ω resistor.
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Write down the electromagnetic wave equation for free space in terms of electric field.
There are two major differences between "center of gravity" and "center of mass": 1) The term "center of gravity" aplies to the bodies with mass and weight, while the term "cent
Explain the Air Resistance If you drop a feather and a cannonball at the same time from the same height, which will hit the ground first? The cannonball of course. Why does the
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