Two identical wires are stretched by the same tension of \( 100 \mathrm{~N} \) and each emits a ...

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Two identical wires are stretched by the same tension of \( 100 \mathrm{~N} \) and each emits a note of frequency \( 200 \mathrm{~Hz} \). If the tension in one wire is increased by \( 1 \mathrm{~N} \), then the beat frequency is
(a) \( 2 \mathrm{~Hz} \)
(b) \( \frac{1}{2} \mathrm{~Hz} \)
(c) \( 1 \mathrm{~Hz} \)
(d) None of these
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