Question: Q. 7. Two dipoles, made from charges ±q and ±Q respectively, have equal dipole moments. Give the (i) ratio between the ‘separations’ of these two pairs of charges, (ii) angle between the dipole axes of these two dipoles.

U] [O.D. I, II, III 2013; CBSE SQP 2013]

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Solution:

Ans. As qa=Qa, we have

aa=Qq

and

θ=0.

[CBSE Marking Scheme, 2013]

Detailed Answer :

If distance between two charges of dipoles be l1 and l2 respectively, then dipole moments of dipoles will be ql1 and Ql2

(i) ratio between the separations of two pairs of charges q,Q

ql1=Ql2  or, l1l2=Qq

(ii) angle between dipole axes of two dipoles will be zero.



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