1
JEE Main 2022 (Online) 24th June Morning Shift
+4
-1

A resistance of 40 $$\Omega$$ is connected to a source of alternating current rated 220 V, 50 Hz. Find the time taken by the current to change from its maximum value to the rms value :

A
2.5 ms
B
1.25 ms
C
2.5 s
D
0.25 s
2
JEE Main 2021 (Online) 1st September Evening Shift
+4
-1
For the given circuit the current i through the battery when the key in closed and the steady state has been reached is __________.

A
6 A
B
25 A
C
10 A
D
0 A
3
JEE Main 2021 (Online) 31st August Morning Shift
+4
-1
In an ac circuit, an inductor, a capacitor and a resistor are connected in series with XL = R = XC. Impedance of this circuit is :
A
2R2
B
Zero
C
R
D
R$$\sqrt 2$$
4
JEE Main 2021 (Online) 26th August Evening Shift
+4
-1
In the given circuit the AC source has $$\omega$$ = 100 rad s-1. Considering the inductor and capacitor to be ideal, what will be the current I flowing through the circuit?

A
5.9 A
B
3.16 A
C
0.94 A
D
6 A
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