Pravah- 2k15

Question 1 of 5

1

Which of the following gives materials in order of decreasing values of permeability ?

Select one of the following:

Cobalt, Nickel, Aluminium, Iron
Permalloy, Nickel, Air, Water
Silver, Copper, Aluminium, Iron
Pure iron, Silicon iron. Aluminium, Bismuth.

Explanation

Question 2 of 5

1

In electrical machines the material preferred for pole shoes of electro-magnets is

Select one of the following:

Pure iron
Aluminium
Copper
Lead.

Explanation

Question 3 of 5

1

If the resistivity of aluminium is 0.0283 x 10-6 Ω-m, the resistivity of copper could be

Select one of the following:

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

Explanation

Question 4 of 5

1

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

Select one of the following:

Explanation

Question 5 of 5

1

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

Select one of the following:

4.46
3.15
2.23
0

	Created by Lilli Prasath almost 9 years ago

Prelims for the quiz

Pravah- 2k15

Pravah- 2k15

Question 1 of 5

Which of the following gives materials in order of decreasing values of permeability ?

Select one of the following:

Explanation

Question 2 of 5

In electrical machines the material preferred for pole shoes of electro-magnets is

Select one of the following:

Explanation

Question 3 of 5

If the resistivity of aluminium is 0.0283 x 10-6 Ω-m, the resistivity of copper could be

Select one of the following:

Explanation

Question 4 of 5

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

Select one of the following:

Explanation

Question 5 of 5

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

Select one of the following:

Explanation

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