NEET 2020
- Exam
- NEET
- Year
- 2020
- Subject
- Physics
- Chapter
- Alternating Current
NEET 2020 · Physics · Alternating Current
A series LCR circuit is connected to an ac voltage source. When L...
A series circuit is connected to an ac voltage source.
When is removed from the circuit, the phase difference between current and voltage is .
If instead is removed from the circuit, the phase difference is again between current and voltage. The power factor of the circuit is:
Options
- A
- B
- C
- Dzero
Correct answer
B.
Step-by-step solution
As phase angle contribution by capacitor and inductor are equal in magnitude, so
\begin{gathered}\mathrm{X}_{\mathrm{L}}=\mathrm{X}_{\mathrm{c}}\\
\Rightarrow \omega \mathrm{L}=\frac{1}{\omega \mathrm{C}}
\end{gathered}