What is the impedance of a coil having resistance 3 Ohms and reactance 4 Ohms

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Solution

Dear Student ,
$I m p e n d a n c e = Z = \sqrt{{(4)}^{2} + {(3)}^{2}} = 5 Ω$

Regards

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What is the impedance of a coil having resistance 3 Ohms and reactance 4 Ohms

Dear Student , Impendance =Z=42+32=5 Ω Regards

Dear Student ,
$I m p e n d a n c e = Z = \sqrt{{(4)}^{2} + {(3)}^{2}} = 5 Ω$

Regards