Alternating Current PYQs - Last 5 Years

AP EAPCET / Physics / Electromagnetism / 26 recent questions

PhysicsElectromagnetism2021-2025

All Alternating Current PYQs Last 10 Years Create chapter test

Practice 26 AP EAPCET Physics questions from Alternating Current. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.

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Last 5 Years Alternating Current Questions

Showing 26 of 26 filtered questions.

1Alternating Current

An AC source of internal resistance $10^3 \Omega$ is connected to a transformer. The ratio of the number of turns in the primary to the number of turns in the secondary to match the source to a load resistance of $10 \Omega$ is

2Alternating Current

A coil of inductive reactance $\frac{1}{\sqrt{3}} \Omega$ and a resistance $1 \Omega$ are connected in series to a $200 \mathrm{~V}, 50 \mathrm{~Hz}$ AC source. The time lag between voltage and current is

3Alternating Current

In a series LCR circuit, the voltages across the capacitor, resistor and inductor are in the ratio $2: 3: 6,$ if the voltage of the AC source in the circuit is 240 V , then the voltage across the inductor is

4Alternating Current

If the voltage and current in an AC circuit are respectively $50 \sin (50 t) \mathrm{V}$ and $50 \sin \left(50 t+\frac{\pi}{4}\right) \mathrm{mA}$, then the power dissipated in the circuit is nearly

5Alternating Current

If a resistor of resistance $4 \Omega$, a capacitor of capacitive reactance $6 \Omega$ and an inductor of inductive reactance $9 \Omega$ are connected in series with an AC source, then the impedance of the circuit is

6Alternating Current

In a series resonant LCR circuit, for the power dissipated to become half of the maximum power dissipated, the current amplitude is

7Alternating Current

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

8Alternating Current

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

9Alternating Current

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

10Alternating Current

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

11Alternating Current

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

12Alternating Current

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

13Alternating Current

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 an...

14Alternating Current

A resistance of $20 \Omega$ is connected to a source of an alternating potential $V=200 \sin (10 \pi t)$. If $t$ is the time taken by the current to change from the peak value to rms value, then $t$ is (in seconds)

15Alternating Current

A full wave rectifier circuit is operating from 50 Hz mains. The fundamental frequency in the ripple output will be

16Alternating Current

An inductor and a resistor are connected in series to an AC source of voltage $144 \sin \left(100 \pi t+\frac{\pi}{2}\right) \mathrm{V}$. If the current in the circuit is $6 \sin \left(100 \pi t+\frac{\pi}{6}\right) \mathrm{A}$, then the re...

17Alternating Current

A series $L-C-R$ circuit is shown in the figure. Where the inductance of 10 H , capacitance $40 \mu \mathrm{~F}$ and resistance $60 \Omega$ are connected to a variable frequency 240 V source. The current at resonating frequency is

18Alternating Current

In the figure. If $A$ and $B$ are identical bulbs, which bulb glows brighter.

19Alternating Current

The frequency of AC at which $16 \mu \mathrm{~F}$ capacitor and $\frac{10}{\pi^2} \mathrm{mH}$ inductor will have same reactance is

20Alternating Current

An inductor and a resistor are connected in series to an AC source. If the power factor of the circuit is 0.5 , the ratio of the resistance of the resistor and the reactance of the inductor is

21Alternating Current

An \(R-L-C\) circuit consists of a \(150 \Omega\) resistor, \(20 \mu \mathrm{F}\) capacitor and a 500 mH inductor connected in series with a 100 V AC supply. The angular frequency of the supply voltage is $$400 \mathrm{rad} \mathrm{s}^{-1}$...

22Alternating Current

A coil of inductance 0.1 H and resistance \(110 \Omega\) is connected to a source of 110 V and 350 Hz . The phase difference between the voltage maximum and the current maximum is

23Alternating Current

Capacitive reactance of a capacitor in an AC circuit is \(3 \mathrm{k} \Omega\). If this capacitor is connected to a new AC source of double frequency, the capacitive reactance will become.

24Alternating Current

A 20 V AC is applied to a circuit consisting of
a resistor and a coil with negligible
resistance. If the voltage across the resistor is
12 V, the voltage across the coil is

25Alternating Current

A resonant frequency of a current is \(f\). If the
capacitance is made four times the initial
value, then the resonant frequency will
become

26Alternating Current

A bulb of resistance \(280 \Omega\) is supplied with a 200 V AC supply. What is the peak current?