Match List - I with List - II.
| List - I | List - II |
|---|---|
| (A) Magnetic induction | (I) Ampere meter2 |
| (B) Magnetic intensity | (II) Weber |
| (C) Magnetic flux | (III) Gauss |
| (D) Magnetic moment | (IV) Ampere meter |
Choose the correct answer from the options given below:
Solution
<p>(A) The unit "gauss" is used to measure magnetic induction, also known as magnetic flux density, within the CGS system of units.</p>
<p>$B = {\phi \over A} = {{\max well} \over {c{m^2}}} = gauss\,(CGS)$</p>
<p>(B) Magnetic intensity (H) is defined as the product of the number of turns per unit length in a coil (n) and the current that it carries (I).</p>
<p>i.e. $H = nI = {N \over L}I$</p>
<p>Unit : A/m or Am$^{-1}$</p>
<p>(C) Magnetic flux, $\phi = BA$</p>
<p>unit : weber</p>
<p>(D) Magnetic moment (M) : magnetic moment of a current loop, $M = NIA$</p>
<p>where, N = number of turns</p>
<p>I = current</p>
<p>A = Area</p>
<p>So, unit = Am$^2$</p>
<p>Hence, option A is correct.</p>
About this question
Subject: Physics · Chapter: Magnetism · Topic: Bar Magnet and Magnetic Field
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