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JEE Main 2022 (Online) 24th June Morning Shift
Numerical
+4
-1
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As shown in the figure an inductor of inductance 200 mH is connected to an AC source of emf 220 V and frequency 50 Hz. The instantaneous voltage of the source is 0 V when the peak value of current is $${{\sqrt a } \over \pi }$$ A. The value of $$a$$ is ___________.

JEE Main 2022 (Online) 24th June Morning Shift Physics - Alternating Current Question 62 English

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2
JEE Main 2021 (Online) 31st August Evening Shift
Numerical
+4
-1
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At very high frequencies, the effective impendence of the given circuit will be ________________ $$\Omega$$.

JEE Main 2021 (Online) 31st August Evening Shift Physics - Alternating Current Question 77 English
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3
JEE Main 2021 (Online) 27th August Evening Shift
Numerical
+4
-1
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An ac circuit has an inductor and a resistor resistance R in series, such that XL = 3R. Now, a capacitor is added in series such that XC = 2R. The ratio of new power factor with the old power factor of the circuit is $$\sqrt 5 :x$$. The value of x is ___________.
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4
JEE Main 2021 (Online) 27th August Morning Shift
Numerical
+4
-1
Change Language
The alternating current is given by $$i = \left\{ {\sqrt {42} \sin \left( {{{2\pi } \over T}t} \right) + 10} \right\}A$$

The r.m.s. value of of this current is ................. A.
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