A platinum wire of diameter 2.9 mm is connected in series to a 50 F capacitor an

Question

A platinum wire of diameter 2.9 mm is connected in series to a 50 F capacitor and a 0.00068 H inductor to form an RLC circuit. The resistivity of platinum is 1.1 × 107 m. Calculate the length of the platinum wire when the current is critically damped. An- swer in units of m. A platinum wire of diameter 2.9 mm is connected in series to a 50 F capacitor and a 0.00068 H inductor to form an RLC circuit. The resistivity of platinum is 1.1 × 107 m. Calculate the length of the platinum wire when the current is critically damped. An- swer in units of m.

Explanation / Answer

   under critically damped condition theresistance becomes    R = Rc       = (4 L / C)       = .......    from the formula    R = l / A    solve for the length of the wire

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