3074860
Beschreibung
Quiz von Lilli Prasath, aktualisiert more than 1 year ago
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Erstellt von Lilli Prasath
vor mehr als 9 Jahre
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Frage 1
Frage
Which of the following gives materials in order of decreasing values of permeability ?
Antworten
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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.
Frage 2
Frage
In electrical machines the material preferred for pole shoes of electro-magnets is
Antworten
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Pure iron
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Aluminium
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Copper
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Lead.
Frage 3
Frage
If the resistivity of aluminium is 0.0283 x 10-6 Ω-m, the resistivity of copper could be
Antworten
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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
Frage 4
Frage
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
Antworten
Frage 5
Frage
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
Antworten
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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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