Match Magnetic Quantities with SI Units JEE Main PYQ

 

❓ Question

Match the following:

List I	List II
(A) Magnetic Induction	(1) Ampere metre²
(B) Magnetic Intensity	(2) Weber
(C) Magnetic Flux	(3) Gauss
(D) Magnetic Moment	(4) Ampere/metre

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✍️ Solution

(A) Magnetic Induction $(B)$

Using magnetic force,

$$F=qvB$$

Therefore,

$$[B]=\frac{[F]}{[q][v]}$$

The unit of magnetic induction is Tesla or Gauss.

$$\boxed{A\rightarrow3}$$

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(B) Magnetic Intensity $(H)$

We know,

$$B=\mu H$$

Therefore,

$$H=\frac{B}{\mu}$$

The SI unit of magnetic intensity is

$$\boxed{\text{Ampere/metre}}$$

Hence,

$$\boxed{B\rightarrow4}$$

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(C) Magnetic Flux $(\phi)$

Magnetic flux is

$$\phi=B\cdot A$$

Its SI unit is Weber.

$$\boxed{C\rightarrow2}$$

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(D) Magnetic Moment $(M)$

Magnetic moment is

$$M=IA$$

Therefore, its SI unit is

$$\text{Ampere}\times\text{metre}^2$$
$$\boxed{D\rightarrow1}$$

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✅ Final Answer

$$\boxed{A\rightarrow3,\quad B\rightarrow4,\quad C\rightarrow2,\quad D\rightarrow1}$$