Related Questions
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Which of the following has the least number of valence electrons?
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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 temperature coefficient of resistance of conductors is
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Which of the following materials has the highest dielectric strength?
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The physical motion resulting from the forces of magnetic fields is called
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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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The induced emf in a wire loop that is moved parallel to a uniform magnetic field is
B. Dependent on the area of the loop
C. Dependent on the shape of the loop
D. Dependent on the magnitude of the field
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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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An effect which is generally used in the gausameter to measure flux density.
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Ohm's law cannot be applied to which material?
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What is used as the dielectric material in high voltage transformers?
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What determines the atomic number of an element?
B. The number of electrons
C. The number of neutrons
D. The number of neutrons and protons
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The ratio between the intensity of magnetization produced in a substance to the magnetizing force producing it
C. Magnetic susceptibility
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A test charge means a charge of
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What is the maximum number of electrons that can be accommodated in the last orbit of an atom?
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Which of the following electric quantities is vector in character?
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If the right handed bottle-opener cork screw is assumed to be along the conductor so as to advance in the direction of current flow, the motion of its handle will indicate the direction of magnetic flux produced around the conductor. This is known as
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Hydrogen is an example of a _____ material.
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Hipernik is an alloy containing __________ iron and __________ nickel.
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A magnetic flux of 2.5 x10^4 Wb through an area of 5 x10^4 square meters results in
B. 0.5 Tesia of flux density
D. 5000 Tesia of flux density
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The conduction of electricity across the surface of a dielectric is called
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A theorem which states that an electric current flowing in a circuit produces a magnetic field at external points equivalent to that due to a magnetic shell whose bounding edge is the conductor and whose strength of the current.
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Which of the following magnetic materials can be easily magnetized in both direction?
A. Soft magnetic materials
B. Hard magnetic materials
C. High hysteresis loss materials
D. Low hysteresis loss materials
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Calculate the permeability (in T/A. t/m) of a magnetic material that has a relative permeability of 300
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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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All magnetic field originates from
A. moving electric charge
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What is the reluctance of a magnetic path having a length of 2x 10^-3m and crosssectional area of 2.5 x 10^-3 m^2?
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Calculate the flux density that will be produced by the field intensity of 2000 a. t/m for a permeability of 126 x 10^-6 T/A.t/m
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Who developed the electromagnetic theory of light in 1862?
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The electric field intensity between the parallel plate air capacitor is 20 N/C. If an insulating slab of relative permittivity 5 is placed between the platesa then electric field intensity will be