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Alternating Current

Get chapter-wise JEE Main & Advanced questions with solutions

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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Q JEE MAIN 2025
In a series LCR circuit, a resistor of $300 \Omega$, a capacitor of 25 nF and an inductor of 100 mH are used. For maximum...
JEE Main Physics Easy
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Q JEE MAIN 2025
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Choke coil is simply...
JEE Main Physics Medium
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Q JEE MAIN 2025
An alternating current is given by $I = {I_A}\sin \omega t + {I_B}\cos \omega t$ . The r.m.s current will be
JEE Main Physics Medium
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Q JEE MAIN 2025
A series LCR circuit is connected to an alternating source of emf E. The current amplitude at resonant frequency is $\mathrm{I}_0$. If the value of...
JEE Main Physics Easy
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