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Alternating Current

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE-MAIN 2021
Seawater at a frequency $f=9 \times 10^2 \mathrm{~Hz}$, has permittivity $\varepsilon=80 \varepsilon_0$ and resistivity $r=0.25 \Omega \mathrm{~m}$. Imagine a parallel plate capacitor is immersed in...
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Q JEE-MAIN 2021
What happens to the inductive reactance and the current in a purely inductive circuit if the frequency is halved ?
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Q JEE-MAIN 2021
Match list I with List II
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Q JEE MAIN 2021
For the given circuit, comment on the type of transformer used :
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Q JEE MAIN 2021
An AC source rated 220 V, 50 Hz is connected to a resistor. The time taken by the current to change from its maximum to...
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Q JEE MAIN 2021
In a scries LCR resonance circuit, if we change the resistance only, from a lower to higher value :
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Q _JEE_MAIN_2021
An AC current is given by $\mathrm{I}=\mathrm{I} 1$ sincet +I 2 cosest. A hot wire ammeter will give a reading.
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Q JEE MAIN 2021
A sinusoidal voltage of peak value 250 V is applied to a series LCR circuit, in which $\mathrm{R}=8 \Omega, \mathrm{~L}=24 \mathrm{mH}$ and $\mathrm{C}=60 \mu \mathrm{~F}$....
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Q JEE MAIN 2021
In a series LCR resonant circuit, the quality factor is measured as 100. If the inductance is increased by two fold and resistance is decreased...
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Q JEE MAIN 2021
An RC circuit as shown in the figure is driven by a AC source generating a square wave. The output wave pattern monitored by CRO...
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