Alternating Current PYQs - Last 10 Years
JEE Main / Physics / Electricity / 167 recent questions
PhysicsElectricity2017-2026
Practice 167 JEE Main Physics questions from Alternating Current. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
167
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Physics / Electricity
2017-2026
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167
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2017-2026
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MCQ64.7%
INTEGER35.3%
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#1 Easy94
#2 Medium73
105 in last 5 years167 in last 10 years
Last 10 Years Alternating Current Questions
Showing 17 of 167 filtered questions.
1Alternating Current
A 750 Hz, 20 V (rms) source is connected to a
resistance of 100 \(\Omega\), an inductance of 0.1803 H
and a capacitance of 10 \(\mu\)F all in series. The
time in which the resistance (heat capacity
2 J/oC) will get heated by 10oC. (assume...
resistance of 100 \(\Omega\), an inductance of 0.1803 H
and a capacitance of 10 \(\mu\)F all in series. The
time in which the resistance (heat capacity
2 J/oC) will get heated by 10oC. (assume...
MCQ+4 / -12020
2Alternating Current
An inductance coil has a reactance of 100 \(\Omega\).
When an AC signal of frequency 1000 Hz is
applied to the coil, the applied voltage leads
the current by 45o. The self-inductance of the
coil is
When an AC signal of frequency 1000 Hz is
applied to the coil, the applied voltage leads
the current by 45o. The self-inductance of the
coil is
MCQ+4 / -12020
3Alternating Current
A power transmission line feeds input power at 2300 V to a srep down transformer with its primary windings having 4000 turns. The output power is delivered at 230 V by the transformer. If the current in the primary of the transformer is 5A ...
MCQ+4 / -12019
4Alternating Current
A series AC circuit containing an inductor (20 mH), a capacitor (120 \(\mu\)F) and a resistor (60 \(\Omega\)) is driven by an AC source of 24V/50 Hz. The energy dissipated in the circuit in 60 s is :
MCQ+4 / -12019
5Alternating Current
An alternating voltage v(t) = 220 sin 100 \(\pi\)t volt
is applied to a purely resistance load of 50\(\Omega\) .
The time taken for the current to rise from half
of the peak value to the peak value is :
is applied to a purely resistance load of 50\(\Omega\) .
The time taken for the current to rise from half
of the peak value to the peak value is :
MCQ+4 / -12019
6Alternating Current
A circuit connected to an ac source of emf
e = e0sin(100t) with t in seconds, gives a phase
difference of \(\pi\)/4 between the emf e and
current i. Which of the following circuits will
exhibit this ?
e = e0sin(100t) with t in seconds, gives a phase
difference of \(\pi\)/4 between the emf e and
current i. Which of the following circuits will
exhibit this ?
MCQ+4 / -12019
7Alternating Current
In the figure shown, a circuit contains two identical resistors with resistance R = 5\(\Omega\) and an inductance with L = 2mH. An ideal battery of 15 V is connected in the circuit. What will be the current through the battery long after t...
MCQ+4 / -12019
8Alternating Current
In the above circuit, C = \({{\sqrt 3 } \over 2}\)\(\mu\)F, R2 = 20 \(\Omega\), L = \({{\sqrt 3 } \over {10}}\) H and R1 = 10 \(\Omega\). Current in L-R1 path is I1 and in C-R2 path it is I2 . The voltage of A.C. source is given by, V = ...
MCQ+4 / -12019
9Alternating Current
Consider the LR circuit shown in the figure. If the switch S is closed at t = 0 then the amount of charge that
passes through the battery between t = 0 and t = \({L \over R}\)
is :
passes through the battery between t = 0 and t = \({L \over R}\)
is :
MCQ+4 / -12019
10Alternating Current
In the circuit shown,
the switch S1 is closed at time t = 0 and the switch S2 is kept open. At some later time(t0), the switch S1 is opened and S2 is closed. The behavior of the current I as a function of time 't' is given by :
the switch S1 is closed at time t = 0 and the switch S2 is kept open. At some later time(t0), the switch S1 is opened and S2 is closed. The behavior of the current I as a function of time 't' is given by :
MCQ+4 / -12019
11Alternating Current
A transformer consisting of 300 turns in the
primary and 150 turns in the secondary gives
output power of 2.2 kW. If the current in the
secondary coil is 10A, then the input voltage
and current in the primary coil are :
primary and 150 turns in the secondary gives
output power of 2.2 kW. If the current in the
secondary coil is 10A, then the input voltage
and current in the primary coil are :
MCQ+4 / -12019
12Alternating Current
A coil of self inductance 10 mH and resistance 0.1 \(\Omega\) is connected through a switch to a battery of internal
resistance 0.9 \(\Omega\). After the switch is closed, the time taken for the current to attain 80% of the saturation
val...
resistance 0.9 \(\Omega\). After the switch is closed, the time taken for the current to attain 80% of the saturation
val...
MCQ+4 / -12019
13Alternating Current
A power transmission line feeds input power at 2300 V to a step down transformer with its primary windings having 4000 turns, giving the output power at 230 V. If the current in the primary of the transformer is 5 A, and its efficiency i...
MCQ+4 / -12018
14Alternating Current
An ideal capacitor of capacitance \(0.2\,\mu F\) is charged to a potential difference of \(10\) \(V.\) The charging battery is then disconnected. The capacitor is then connected to an ideal inductor of self inductance \(0.5\) \(mH.\) The cu...
MCQ+4 / -12018
15Alternating Current
In an a.c. circuit, the instantaneous e.m.f. and current are given by
e = 100 sin 30 t
i = 20 sin \(\left( {30t - {\pi \over 4}} \right)\)
In one cycle of a.c., the average power consumed by the circuit and the wattless current are, respe...
e = 100 sin 30 t
i = 20 sin \(\left( {30t - {\pi \over 4}} \right)\)
In one cycle of a.c., the average power consumed by the circuit and the wattless current are, respe...
MCQ+4 / -12018
16Alternating Current
For an RLC circuit driven with voltage of amplitude vm and frequency \({\omega _0}\) = \({1 \over {\sqrt {LC} }}\) the current exhibits resonance. The quality factor, Q is given by :
MCQ+4 / -12018
17Alternating Current
A sinusoidal voltage of peak value 283 V and angular frequency 320/s is applied to a series LCR circuit. Given that R=5 \(\Omega\), L=25 mH and C=1000 \(\mu\)F. The total impedance, and phase difference between the voltage across the sour...
MCQ+4 / -12017