Related Questions
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A magnetic material losses its ferromagnetic properties at a point called
B. Inferred absolute temperature
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A substance that attracts pieces iron
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One of the common application of an air- cored choke.
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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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The greater percentage of materials is _________.
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______ is an electromagnet with its core in the form of a close magnetic ring.
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What is the other name for dielectric strength?
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Temporary magnets are commonly employed in
C. moving coils loudspeakers
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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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The magnetic field of a magnetized iron bar when strongly heated
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If the number of valence electrons of an atom is less than 4a then the substance is probably
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The magnetic potential in a magnetic circuit can be measured in terms of
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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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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 is used by permanent magnets as the magnetic material?
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What is the SI unit of reluctance?
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The reluctance of a magnetic circuit is not dependent on which of the following?
A. Number of turns of coil
C. Flux density in the circuit
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The reluctance of a magnetic circuit varies with
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Electrons at the outer shell are called
C. Semiconductor electrons
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What is the unit of reluctance?
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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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The magnetic energy stored in an inductor is ______ current.
A. Directly proportional to
B. Inversely proportional to
C. Directly proportional to the square of
D. Inversely proportional to the square of
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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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How many electrons are needed in the valence orbit to give a material's stability?
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Who developed the electromagnetic theory of light in 1862?
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Defined as the ratio of the volume occupied by the atoms or ions in a unit cell divided by the volume of the unit cell and is used to measure the compactness of a crystal.
A. Atomic packing factor (APF)
B. Ionic Packing Ratio (IPR)
C. Atomic compacting factor (ACF)
D. Ionic compacting ratio (ICR)
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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 temperature coefficient of resistance of a conductor ______ with an increase in temperature.
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The resistance of a material is ____________ its area of cross-section.
C. inversely proportional to
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What is the typical saturation flux density for most magnetic materials?