Related Questions
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A group of magnetically aligned atoms 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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Electric lines of force leave or enter the charge surface at an angle of
D. depending upon the angle of launch and entry
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If the solenoid is gripped by the right hand with the fingers pointing the direction of current flowa the outstretched thumb will then point the north pole. This is known as
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If on looking at any one end of a solenoid; the direction of current flow is found to be clockwise then the end under observation is a south pole. This is known as
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What is another name for relative permittivity?
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The resistivity of a conductor ___________ with an increase in temperature.
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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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Flux density is measured in
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Under ordinary conditionsa a body is considered
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Gases whose particles are charged are known as
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Refers to the magnetic lines
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Which of the following is used by permanent magnets as the magnetic material?
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Cobalt is an example of a ______ material.
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The force acting on a unit n- pole placed at that point is called
A. Magnetic field intensity
B. Electric field intensity
C. Electromagnetic field intensity
D. Intensity magnetization
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The force between two magnetic poles is _____ the relative permeability of the medium.
A. directly proportional to
C. inversely proportional to
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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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The ratio of the permeability of material to the permiabiity of air or vacuum.
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An atom or a group of atoms that carries a net electric charge.
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An alloy of 40 percent iron and 60 percent nickel.
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The relation between absolute permittivity of air ( 0)a absolute p and velocity of light (c) is given by
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Germanium atom has ______ protons and ______ electrons.
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The greater percentage of materials is _________.
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The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium of relative permittivity of 3a then electric potential at that point will be
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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
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Back emf refers to the
A. Current equal to the applied emf
C. Current opposing the applied emf
D. Voltage opposing the applied emf
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The emf produced in a wire by its motion across a magnetic field does not depend upon the
C. Orientation of the wire
D. Flux density of the field
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An effect which is generally used in the gausameter to measure flux density.
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The electrons in the last orbit of an atom are called _______ electrons.
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Which of the following materials has the least hysteresis loop area?