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Three similar wires of frequency \( n_{1}, n_{2} \) and \( n_{3} \) are joined to make one wire. Its frequency will be [CBSE PMT 2000, 14]
\( \mathrm{P} \)
(a) \( n=n_{1}+n_{2}+n_{3} \)
(b) \( \frac{1}{n}=\frac{1}{n_{1}}+\frac{1}{n_{2}}+\frac{1}{n_{3}} \)
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(c) \( \frac{1}{\sqrt{n}}=\frac{1}{\sqrt{n_{1}}}+\frac{1}{\sqrt{n_{2}}}+\frac{1}{\sqrt{n_{3}}} \)
(d) \( \frac{1}{n^{1}}=\frac{1}{n_{1}^{2}}+\frac{1}{n_{2}^{2}}+\frac{1}{n_{3}^{2}} \)
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