3074860
Descrição
Quiz por Lilli Prasath, atualizado more than 1 year ago
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Criado por Lilli Prasath
mais de 9 anos atrás
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Questão 1
Questão
Which of the following gives materials in order of decreasing values of permeability ?
Responda
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Cobalt, Nickel, Aluminium, Iron
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Permalloy, Nickel, Air, Water
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Silver, Copper, Aluminium, Iron
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Pure iron, Silicon iron. Aluminium, Bismuth.
Questão 2
Questão
In electrical machines the material preferred for pole shoes of electro-magnets is
Responda
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Pure iron
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Aluminium
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Copper
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Lead.
Questão 3
Questão
If the resistivity of aluminium is 0.0283 x 10-6 Ω-m, the resistivity of copper could be
Responda
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0.017 x 10-5 Ω-m
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0.0382 x 10-5 Ω-m
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0.0832 x 10-6 Ω-m
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0.0889 x 10-6 Ω-m
Questão 4
Questão
Three moving iron type voltmeters are connected as shown below. Voltmeter readings are V, V and V 1 2 as indicated. The correct relation among the voltmeter
readings is
Responda
Questão 5
Questão
The input impedance of the permanent magnet moving coil (PMMC) voltmeter is infinite. Assuming that the diode shown in the figure below is ideal, the reading of the voltmeter in Volts is
Responda
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4.46
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3.15
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2.23
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0
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