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A series LCR circuit has resistance 10Ω and reactance is 72 Ω. What is the impedance of the circuit?

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Question

A series LCR circuit has resistance 10Ω and reactance is `7sqrt2` Ω. What is the impedance of the circuit?

Sum
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Solution

Given:

R = 10 Ω, |XL - XC| = `7sqrt2` Ω 

To find: Impedance (Z)

Formula: X = `sqrt("R"^2 + ("X"_"L" - "X"_"C")^2)` 

Calculation:

From formula,

Z = `sqrt(10^2 + (7sqrt2)^2)`

= `sqrt(100 + 98)`

= 14.07 Ω

The impedance of the circuit is 14.07 Ω. 

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Chapter 13: AC Circuits - Short Answer I

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