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Alternating Current

15 questions · Physics · JEE Advanced

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JEE Advanced
Physics
Alternating Current

Alternating Current

15 questions · Physics · JEE Advanced

A circuit with an electrical load having impedance $Z$ is connected with an AC source as shown in the diagram. The source voltage varies in time as $V (t) = 300 sin (400 t) V$ , where $t$ is time in s . List-I shows various options… Includes table Includes diagram2025 · Shift 1 · Q47 · MCQ
The circuit shown in the figure contains an inductor $L$ , a capacitor $C_{0}$ , a resistor $R_{0}$ and an ideal battery. The circuit also contains two keys $K_{1}$ and $K_{2}$ . Initially, both the keys are open and there is no… Includes table Includes diagram2024 · Shift 1 · Q51 · MCQ
A series LCR circuit is connected to a $45 sin (ω t)$ Volt source. The resonant angular frequency of the circuit is $1 0^{5} rad s^{- 1}$ and current amplitude at resonance is $I_{0}$ . When the angular frequency of the… Includes table2023 · Shift 1 · Q50 · MCQ
In a circuit, a metal filament lamp is connected in series with a capacitor of capacitance C $μ$ F across a 200 V, 50 Hz supply. The power consumed by the lamp is 500 W while the voltage drop across it is 100 V. Assume that there is no…2021 · Shift 2 · Q49 · Numerical
In a circuit, a metal filament lamp is connected in series with a capacitor of capacitance C $μ$ F across a 200 V, 50 Hz supply. The power consumed by the lamp is 500 W while the voltage drop across it is 100 V. Assume that there is no…2021 · Shift 2 · Q50 · Numerical
In the circuit shown, $L = 1 μ H, C = 1 μ F$ and $R = 1 k Ω.$ They are connected in series with an a.c. source $V = V_{0} sin ω t$ as shown. Which of the following options is/are correct? Includes diagram2017 · Shift 1 · Q42 · Multiple correct
The instantaneous voltages at three terminals marked $Z$ and $Z$ are given by $V_{x} = V_{0} sin ω t, V_{Y} = V_{0} sin$ $(ω t + \frac{2 π}{3})$ and $V z = V_{0} sin (ω t + \frac{4 π}{3})$ …2017 · Shift 2 · Q39 · Multiple correct
At time t = 0, terminal A in the circuit shown in the figure is connected to B by a key and an alternating current I(t) = I0 cos ( $ω$ t), with I0 = 1 A and $ω$ = 500 rad s-1 starts flowing in it with the initial direction shown in… Includes diagram2014 · Shift 1 · Q48 · Multiple correct
A thermal power plant produces electric power of 600 kW at 4000 V, which is to be transported to a place 20 km away from the power plant for consumers' usage. It can be transported either directly with a cable of large current carrying…2013 · Shift 2 · Q53 · MCQ
In the given circuit, the AC source has $ω$ = 100 rad/s. Considering the inductor and capacitor to be ideal, the correct choice(s) is(are) Includes diagram2012 · Shift 2 · Q59 · Multiple correct
A series RC-current is connected to AC voltage source. Consider two cases : (A) When C is without a dielectric medium and (B) when C is filled with dielectric of constant 4. The current IR through the resistor and voltage VC across the…2011 · Shift 2 · Q54 · Multiple correct
A series RC combination is connected to an AC voltage of angular frequency $ω$ = 500 rad/s. If the impedance of the RC circuit is R $1.25$ , the time constant (in millisecond) of the circuit is .2011 · Shift 2 · Q55 · Numerical
An AC voltage source of variable angular frequency $ω$ and fixed amplitude V0 is connected in series with a capacitance C and an electric bulb of resistance R (inductance zero). When $ω$ is increased2010 · Shift 1 · Q69 · MCQ
You are given many resistances, capacitors and inductors. These are connected to a variable DC voltage source (the first two circuits) or an AC voltage source of 50 Hz frequency (the next three circuits) in different ways as shown in… Includes diagram2010 · Shift 2 · Q57 · MCQ
STATEMENT 1 A vertical iron rod has a coil of wire wound over it at the bottom end. An alternating current flows in the coil. The rod goes through a conducting ring as shown in the figure. The ring can float at a certain height above the… Includes diagram2007 · Shift 2 · Q20 · MCQ