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What does an electric drive do?

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The retentivity (a property) of material is useful for the construction of permanent magnets.

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Superconductivity is a material property associated with

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
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The unit of retentivity is?

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Which property of lasers enables the medicals practitioners to use them for performing cataract operations? Explain.

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Those materials are well suited for making permanent magnets which have _____ retentivity and _______ coercivity.

asked Mar 25, 2018 in Electrical Engineering by Shimroz123
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A highly conductive material must have?

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asked Mar 28, 2018 in Electrical engineering materials by Shimroz123
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What is antiferromagnetic material?

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Filters with the ___ characteristic are useful when a rapid roll-off is required because it provides a roll-off rate greater than –20/dB/decade/pole:  (1) Butterworth (2) Chebyshev (3) Bessel (4) Elliptical 

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In electrical machines the material preferred for pole shoes of electromagnets is A. Pure iron B. Aluminium C. Copper D. Lead.

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Which of the following function is useful in system requiring error detection and correction codes ? (A) AND-OR (B) OR (C) AND (D) Exclusive -OR

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Following is/are a property/properties of quantization  (a) it is an nonlinear process (b) it is an irreversible process (c) it maps a larger set of input values to a smaller set  (d) all of these 

asked Apr 9, 2018 in Electronics communication by Shimroz123
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For heating a magnetic material using induction heating, the hysteresis and eddy current losses are respectively proportional to (a) f and f 2 (b) f 2 and f (c) f and f (d) none of the above 

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For a pulse transformer, the material used for its core and the possible turn ration from primary to secondary are respectively   (A) ferrite : 20 : 1 (B) laminated iron : 1 :1 (C) ferrite : 1 : 1 (D) powered iron : 1: 1

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Electrostatic voltmeters are particularly suitable for measuring high voltages because the construction is simplified due to

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Which property of rubber is used in tyres? Name and explain the property. 

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The property of materials by which they can be drawn into wires is known as: A) malleability B) elasticity C) creep D) ductility

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Which of the following is an inherent property of an optical signal and cannot be eliminated even in principle? (1) Thermal noise (2) Shot noise (3) Environmental noise (4) Background Noise

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The transmission line distance protection relay having the property of being inherently directional is (A) impedance relay (B) MHO relay (C) OHM relay (D) reactance relay

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The property of sand due to which the sand grains stick together, is called 1. Collapsibility 2. Permeability 3. Cohesiveness 4. Adhesiveness

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State function of Busbar and which material is used for busbar?

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Draw B-H curve for magnetic material and state its nature. State the significance of hysteresis loop. Also draw the hysteresis loop for hard steel and soft steel. 

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The material used for fuse wire should be of   (a) low resistivity and high melting point (b) high resistivity and high melting point (c) high resistivity and low melting point (d) low resistivity and low melting point 

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The best suitable material for the heating element is (a) Tungsten (b) Nichrome (c) Manganin (d) Carbon 

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The most suitable material for transformer core is  (1) hot rolled grain oriented steel (2) cold rolled grain oriented steel (3) aluminium (4) copper

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Explain the construction and working of a photoelectric cell with a neat diagram. 

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