AP EAPCET 2025 - 21st May Morning Shift | Alternating Current Question 10 | Physics

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

$\frac{f}{2}$

$\frac{6}{4}$

$4 f$

AP EAPCET 2024 - 23th May Morning Shift

MCQ (Single Correct Answer)

-0

An alternating current is given by $i=(3 \sin \omega t+4 \cos \omega t) \mathrm{A}$. The rms current will be

$\frac{7}{\sqrt{2}} \mathrm{~A}$

$\frac{1}{\sqrt{2}} \mathrm{~A}$

$\frac{5}{\sqrt{2}} \mathrm{~A}$

$\frac{3}{\sqrt{2}} \mathrm{~A}$

AP EAPCET 2024 - 22th May Morning Shift

MCQ (Single Correct Answer)

-0

A 50 Hz AC circuit has a 10 mH inductor and a $2 \Omega$ resistor in series. The value of capacitance to be placed in series in the circuit to make the circuit power factor as unity is

$1.014 \times 10^{-6} \mathrm{~F}$

$1.014 \times 10^{-3} \mathrm{~F}$

$2.6 \times 10^{-3} \mathrm{~F}$

$4.125 \times 10^{-3} \mathrm{~F}$

AP EAPCET 2024 - 21th May Evening Shift

MCQ (Single Correct Answer)

-0

A resistor of resistance $R$, inductor of inductive reactance $2 R$ and a capacitor of capacitive reactance $X_C$ are connected in series to an AC source.If the series $L-C-R$ circuit is in resonance, then the power factor of the circuit and the value, $X_C$ are respectively

0.5 and $4 R$

1 and $2 R$

0.5 and $2 R$

1 and $4 R$

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