UPSC NDA I 2010 General Ability Paper

Question : 111 of 150

Marks: +1, -0

Which one of the statements given below is not correct?

A vertical plane passing through the axis of a freely suspended magnet is called the magnetic meridian
A vertical plane passing through the axis of rotation of the Earth is called the geographical meridian.
The degree to which the magnetic field can penetrate a medium is known as the relative permeability of the medium.
The relative permeability is not a dimensionless quantity.

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