MHT CET 2026 19th April Morning Shift | Alternating Current Question 12 | Physics

For a series LCR circuit inductive reactance $X_L$ is equal to resistance $R$ and also equal to twice the capacitive reactance $X_C$. The impedance of the circuit and the phase difference between voltage V and current i are respectively

$\sqrt{5}R,\ \tan^{-1}\left(\dfrac{1}{2}\right)$

$\sqrt{5}R,\ \tan^{-1}(2)$

$\dfrac{\sqrt{5}R}{2},\ \tan^{-1}\left(\dfrac{1}{2}\right)$

$\dfrac{\sqrt{5}R}{2},\ \tan^{-1}(2)$

MHT CET 2026 19th April Morning Shift

MCQ (Single Correct Answer)

-0

An alternating voltage $e = 150\sqrt{2}\sin 100t$ volt is applied to a capacitor of capacity $2\ \mu\text{F}$. The root mean square value of current in the circuit is

$300$ mA

$150$ mA

$30$ mA

$15$ mA

MHT CET 2026 19th April Morning Shift

MCQ (Single Correct Answer)

-0

In an LCR circuit at resonance, the a.c. source current is
A) maximum in a series LCR circuit only.
B) maximum in a parallel LCR circuit only.
C) maximum in both series and parallel LCR circuits.
D) minimum in both series and parallel LCR circuits.
The correct answer is

MHT CET 2025 5th May Evening Shift

MCQ (Single Correct Answer)

-0

In an LC circuit, angular frequency at resonance is $\omega$. The new angular frequency when inductance is made four times and capacitance is made eight times is

$\frac{\omega}{2 \sqrt{2}}$

$\frac{\omega}{4 \sqrt{2}}$

$\frac{\omega}{4}$

$\frac{\omega}{\sqrt{2}}$

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