NEET-XII-Physics
39: Alternating Current
- #7A series AC circuit has a resistance of 4 Ω and a reactance of 3 Ω. The impedance of the circuit is
(a) 5 Ω
(b) 7 Ω
(c) 12/7 Ω
(d) 7/12 ΩdigAnsr: aAns : (a) 5 Ω
The impedance of the circuit is given by
`` Z=\sqrt{{R}^{2}+{X}^{2}}``
`` R=4\,\mathrm{\,\Omega \,}\&X=3\,\mathrm{\,\Omega \,}``
`` \Rightarrow Z=\sqrt{{4}^{2}+{3}^{2}}=5\,\mathrm{\,\Omega \,}``
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