Question

A series AC circuit has a resistance of 4 Ω and a reactance of 3 Ω. The impedance of the circuit is

Options

•  5 Ω

•  7 Ω

• 12/7 Ω

• 7/12 Ω

Answer 1

5 Ω

The impedance of the circuit is given by
`Z =sqrt(R^2+ X^2`
`R =4Ω&X=3Ω`

`⇒ Z=sqrt4^2 + 3^2 = 5_Ω`