Related Questions
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A magnetizing force of 1000 AT/m will produce a flux density of __________ i
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What is used as the insulating material or dielectric in an electric ion
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The magnetic field of a bar magnet most closely resembles the magnetic field of
B. a straight current- carrying wire
C. a stream of electrons moving parallel to one another
D. a current- carrying wire loop
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The magnetic field around the conductor is determined by the
C. Current divided by the resistance
D. Resistance divided by the current
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A current if flowing east along a power line. If the earth's field is neglecteda the direction of the magnetic field below it is
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The idea of preventing one component from affecting another through their common electric and magnetic field is referred to as
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The temperature coefficient of resistance of semiconductors is
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Which of the following materials has the highest dielectric strength?
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The greater percentage of materials is _________.
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The temperature coefficient of resistance of insulators is
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Hydrogen is an example of a _____ material.
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The phenomenon by which a subtracts pieces of iron
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What revolves about the positive nucleus in a definite orbit?
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Which element has four valence electrons?
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A group of magnetically aligned atoms is called
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The electrons in the last orbit of an atom are called _______ electrons.
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What is the main advantage of temporary magnets?
A. The magnetic flux can be changed.
B. Hysteresis can be decreased.
C. Magnetic materials can be used.
D. Abundance of ferromagnetic material that can be temporarily magnetized.
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Ohm's law can be used only to a _____ circuit or component.
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A substance that attracts pieces iron
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The total number of magnetic lines of force in a magnetic field is called
C. Magnetic flux intensity
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What bond is formed when electrons in the outermost energy orbits of the atoms are shared between two or more electrons?
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A 6- V battery is connected across a solenoid of 100 turns having a resistance of 2 ?a Calculate the number of ampere turns?
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A law stating that the magnetic susceptibilities of most paramagnetic substances are inversely proportional to their absolute temperatures.
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A law that states that the polarity of the induced voltage will oppose the change in magnetic flux causing the induction.
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What bond is formed when one or more electrons in the outermost energy orbit of an atom are transferred to another?
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The quantity 10^6 maxwells is equivalent to one
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Defined as a closed path in which magnetic induction or flux flows
D. Electromagnetic circuit
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What is the unit of magnetomotive force?
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The core of a transformer heats up when its primary is fed from an ac source because of
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The tiniest element of matter