Pravah- 2k15

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Prelims for the quiz
Lilli Prasath
Test por Lilli Prasath, actualizado hace más de 1 año
Lilli Prasath
Creado por Lilli Prasath hace alrededor de 9 años
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Resumen del Recurso

Pregunta 1

Pregunta
Which of the following gives materials in order of decreasing values of permeability ?
Respuesta
  • Cobalt, Nickel, Aluminium, Iron
  • Permalloy, Nickel, Air, Water
  • Silver, Copper, Aluminium, Iron
  • Pure iron, Silicon iron. Aluminium, Bismuth.

Pregunta 2

Pregunta
In electrical machines the material preferred for pole shoes of electro-magnets is
Respuesta
  • Pure iron
  • Aluminium
  • Copper
  • Lead.

Pregunta 3

Pregunta
If the resistivity of aluminium is 0.0283 x 10-6 Ω-m, the resistivity of copper could be
Respuesta
  • 0.017 x 10-5 Ω-m
  • 0.0382 x 10-5 Ω-m
  • 0.0832 x 10-6 Ω-m
  • 0.0889 x 10-6 Ω-m

Pregunta 4

Pregunta
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

Pregunta 5

Pregunta
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
Respuesta
  • 4.46
  • 3.15
  • 2.23
  • 0
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