AP EAPCET 2025 - 22nd May Evening Shift | Alternating Current Question 7 | Physics

A resistor of $450 \Omega$ and an inductor are connected in series to an AC source of frequency $\frac{75}{\pi} \mathrm{~Hz}$. If the power factor of the circuit is 0.6 , then the inductance connected in the circuit is

6 mH

4 H

4 mH

6 H

AP EAPCET 2025 - 22nd May Morning Shift

MCQ (Single Correct Answer)

-0

For better tuning of a series $L C R$ circuit in a communication system, the preferred combination is

$R=20 \Omega: L=15 \mathrm{H}: \mathrm{C}=35 \mu \mathrm{~F}$

$R=15 \Omega: L=40 \mathrm{H}: \mathrm{C}=20 \mu \mathrm{~F}$

$R=25 \Omega: L=15 \mathrm{H}: C=45 \mu \mathrm{~F}$

$R=15 \Omega: L=20 \mathrm{H}: C=45 \mu \mathrm{~F}$

AP EAPCET 2025 - 21st May Evening Shift

MCQ (Single Correct Answer)

-0

In an LCR series circuit, if the potential differences across inductor, capacitor and resistor are $60 \mathrm{~V}, 30 \mathrm{~V}$ and 40 V respectively, then the AC voltage applied to the circuit is

50 V

70 V

130 V

60 V

AP EAPCET 2025 - 21st May Morning Shift

MCQ (Single Correct Answer)

-0

The resonant frequency of an LC circuit is $f_0$. If a dielectric slab of constant 16 is inserted completely between the plates of the capacitor, then the resonant frequency is

$\frac{f}{2}$

$\frac{6}{4}$

$4 f$

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