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In a 3-ø bridge rectifier, the maximum conduction of each thyristor is
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The most suitable power device for a higher frequency (above 100 kHz) switching application, select It from following.
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A snubber circuit is used to
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the fastest switching device, select one of the following
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Leakage current flows through the thyristor in
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Which device that does not have the gate terminal?
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The value of SCR for modern alternator is
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A UJT is sometimes called_______ diode.
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Self-inductance of magnetic coil is proportional to
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Which of following is not a unit of flux?
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The magnetism capacity of electromagnet will increase if the
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The Biot-savarts law is nothing but general modification of
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The magnetic energy kept in an inductor is ______ current
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The Ohm’s law for magnetic circuit is
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In practical magnetic circuits, the air gap is kept
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Hysteresis is the phenomenon of
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The B-H curve is used to find the mmf of_____ in a magnetic circuit.
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The strength of an electromagnet is determined by
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A magnetic field is produced by
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A strong magnetic field is gives to a stationary electron. Then the electron
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By increasing the number of turns 3 times in a toroid, the magnetic flux____
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AT/m is the unit of
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The source of magnetic field is
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One weber is equal to
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The magnetic material used in permanent magnet is
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When magnet is heated
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Which one formula is correct for electric field strength?
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What is the status of lines of force due to charged particles?
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Biot-Savarts law states the relation among magnetic intensity and
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Two straight parallel conductors carry equal currents in opposite direction. The force between them is
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The field at any point on the axis of a current carrying coil will be
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Cork Screw rule is used to find
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In the left hand rule, forefinger always denotes
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The force among two long parallel conductors is inversely proportional to
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Electric field intensity (E) at ant point in an electric field is equal to
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Which of the following represents ohms law
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The right hand instruction for defining the direction of the induced EMF was introduced by
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Two parallel plates are placed at distance D charged by V volt. The field intensity E = _____
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The mixture of iron oxide and aluminium oxide are used in thermit welding is
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Preheating is essential in welding for
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Flash butt welding is
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Seam welding is a type of ____
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Which type of electrode is used in submerged arc welding
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In resistance welding the electrode material is made of
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Arc stability is better with
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Arc length in arc welding should be equal to
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The temperature of plasma tourch is of the order of
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Find which carbon steel is most weldable?
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Forge welding is best suited for
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In arc welding, temperature of the following order may be granted
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Select one of the following which is strongest for brazing joints
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Equipment is used for arc welding a material by carbon electrode
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In MIG welding, the metal is converted in the form of
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Distortion in welding occurs due to
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The most commonly used flame in gas welding is____
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Arc-welding uses following electric supply
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TIG welding is best suited for welding
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Projection welding is___
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for electrical resistance welding the surface of metal must be
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After welding, the welded parts retain which properties responsible for that?
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