Related Questions
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The space outside the magnet where its pole have a force of attraction or repulsion on a magnetic pole is called
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Germanium atom has ______ protons and ______ electrons.
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The amount of magnetizing force to counter balance the resid magnetic material is referred to as
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A positively charged body has
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States that the ratio of the thermal conductivity is proportional to the absolute temperature for all metals.
A. Wien's displacement law
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The magnetic flux of 2000 lines is how many Maxwells?
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Which of the following materials has the least hysteresis loop area?
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What is the measure of the density and sign of the electric charge at a point relative to that at some time?
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The B-H curve of ________ is not a straight line.
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The magnetic flux through a wire loop in a magnetic field does not d
B. The magnitude of the field
D. The angle between the plane of the loop and the direction
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How is mutual inductance between two coils decreased?
A. By using a common core
B. By moving the coils closer
C. By moving the coils apart
D. By increasing the number of turns of either coil
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Defined as a closed path in which magnetic induction or flux flows
D. Electromagnetic circuit
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The reluctance of the magnetic circuit is ________ relative permeability of the material comprising the circuit.
A. directly proportional to
B. inversely proportional to
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The tiniest element of matter
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The uncharged particles which have no effect on its atomic charge.
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The net electrical charge in an isolated system remains constant. This is known as
A. Law of conservation of charge
D. Law of conservation of energy
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Who discovereda the relationship between magnetism and electricity that serves as the foundation for the theory of electromagnetism?
B. Hans Christian Oersted
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A magnetic pole produces 5000 field lines. How much is the flux in webers? A. 50 × 10^-6
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Which of the following has the least number of valence electrons?
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The ability of a material to conduct magnetic flux through it.
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The force between two charges placed a given distance apart ______ as the relative permittivity of the medium is increased.
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What is the unit of reluctance?
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A negative ion results when an atom gains an additional
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A law that states that the current in a thermionic diode varies directly with the three- halves power of anode voltage and inversely with the square of the distance between the electrodesa provided operating conditions are such that the current is limited only by the space charge.
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The magnetic materials should have a large hysteresis loss for one of the following applications.
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How many neutrons does a copper atom have?
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Hydrogen is an example of a _____ material.
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Define as that pole which when placed in air from a similar and equal pole repels it with a force of newtons
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The contribution to the ionization in an ionization chamber by electrons liberated from t he walls.
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The mass of proton is __________ the mass of an electron.