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Alternating Current

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE MAIN 2024
An ac source is connected in given series LCR circuit. The rms potential difference across the capacitor of 20μF is ..............V.
JEE Main Physics Medium
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Q JEE MAIN 2024
A alternating current at any instant is given by $\mathrm{i}=\left[6+\sqrt{56} \sin \left(100 \pi \mathrm{t}+\frac{\pi}{3}\right)\right] \mathrm{A}$. The rms value of the current is $\_\_\_\_$ A.
JEE Main Physics Easy
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Q JEE MAIN 2024
In an ac circuit, the instantaneous current is zero, when the instantaneous voltage is maximum. In this case, the source may be connected to :...
JEE Main Physics Medium
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Q JEE MAIN
In series LCR circuit, the capacitance is changed from C to 4C. To keep the resonance frequency unchanged, the new inductance should be :
JEE Main Physics Easy
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Q JEE MAIN
A parallel plate capacitor has a capacitance C=200pF. It is connected to 230" " V ac supply with an angular frequency 300rad/s. The rms value...
JEE Main Physics Medium
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Q JEE-Main_2024
A series L,R circuit connected with an ac source E=(25sin⁡1000t)V has a power factor of 1/√2. If the source of emf is changed to E=(20sin⁡2000...
JEE Main Physics Medium
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Q JEE-Main_2024
Primary coil of a transformer is connected to 220V ac. Primary and secondary turns of the transforms are 100 and 10 respectively. Secondary coil of...
JEE Main Physics Easy
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Q JEE MAIN 2025
An alternating current is represented by the equation, $i = 100\sqrt 2 \sin (100\pi t)$ ampere. The RMS value of current and the frequency of...
JEE Main Physics Easy
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Q JEE MAIN 2025
For ac circuit shown in figure, ${\rm{R}} = 100{\rm{k}}\Omega $ and ${\rm{C}} = 100{\rm{pF}}$ and the phase difference between ${{\rm{V}}_{{\rm{in }}}}$ and $...
JEE Main Physics Medium
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Q JEE MAIN 2025
An ac current is represented as
$i = 5\sqrt 2 + 10\cos \left( {650\pi t + \frac{\pi }{6}} \right)Amp$
The r.m.s value of the current...
JEE Main Physics Easy
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