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Question

A bar magnet has a pole strength of 15 Am. If the distance from its center to either of the poles is 15 cm, arrange the following steps in sequential order to find its magnetic moment in the SI unit.

(A) Write the given value of pole strength (m) of the magnet.

(B) Substitute the values in the above formula to get the value of M.

(C) Find the value of length(l) of the magnet from the problem and convert it into SI units.

(D) Write the required formula, i.e., magnetic moment, (M)=m×2l.


A

ACBD

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B

CABD

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C

ADCB

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D

DBAC

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Solution

The correct option is C

ADCB


Steps to find its magnetic moment in the SI unit.

Step 1: (A) Write the given value of pole strength (m) of the magnet.

Step 2: (D) Write the required formula, i.e., magnetic moment, (M)=m×2l

Step 3: (C) Find the value of length(l) of the magnet from the problem and convert it into SI units.

Step 4: (B) Substitute the values in the above formula to get the value of M.

Hence, sequential order to find its magnetic moment in the SI unit is ADCB

Therefore, the correct option is option C.


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