Combinations of components - class-X

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Question 1 of 21

For a resistance R and capacitance C in series the impedence is twice that of a parallel combination of the same elements.The frequency of the applied emf shall be.

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$\dfrac{{2\pi }}{{Rc}}$

$\dfrac{1}{{2\pi {R _1}c}}$

$\dfrac{{2\pi }}{{\sqrt {RC} }}$

$\dfrac{1}{{2\pi \sqrt {RC} }}$

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