MCQ
In an ac circuit, the potential differences across an inductance and resistance joined in series are, respectively, $16V$ and $20V.$ The total potential difference across the circuit is.
- A$20V$
- ✓$25.6V$
- C$31.9V$
- D$53.5V$
✓
Answer
Correct option: B.
$25.6V$
In phasor, $\text{V}_\text{R}=20\angle0;\text{V}_\text{L}=16\angle(-90)$
Total potential difference is $=\text{V}_\text{R}+\text{V}_\text{L}=25.6\angle(-38.66)$
Magnitude of total potential difference $= 25.6V$
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