1
JEE Main 2022 (Online) 26th July Morning Shift
Numerical
+4
-1 The effective current I in the given circuit at very high frequencies will be ___________ A. 2
JEE Main 2022 (Online) 25th July Evening Shift
Numerical
+4
-1 Magnetic flux (in weber) in a closed circuit of resistance 20 $$\Omega$$ varies with time t(s) at $$\phi$$ = 8t2 $$-$$ 9t + 5. The magnitude of the induced current at t = 0.25 s will be ____________ mA.

3
JEE Main 2022 (Online) 30th June Morning Shift
Numerical
+4
-1

A series LCR circuit with $$R = {{250} \over {11}}\,\Omega$$ and $${X_L} = {{70} \over {11}}\,\Omega$$ is connected across a 220 V, 50 Hz supply. The value of capacitance needed to maximize the average power of the circuit will be _________ $$\mu$$F. (Take : $$\pi = {{22} \over 7}$$)

4
JEE Main 2022 (Online) 29th June Evening Shift
Numerical
+4
-1 An inductor of 0.5 mH, a capacitor of 200 $$\mu$$F and a resistor of 2 $$\Omega$$ are connected in series with a 220 V ac source. If the current is in phase with the emf, the frequency of ac source will be ____________ $$\times$$ 102 Hz.

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