1
JEE Main 2021 (Online) 27th July Morning Shift
+4
-1
A 0.07 H inductor and a 12$$\Omega$$ resistor are connected in series to a 220V, 50 Hz ac source. The approximate current in the circuit and the phase angle between current and source voltage are respectively. [Take $$\pi$$ as $${{22} \over 7}$$]
A
8.8 A and $${\tan ^{ - 1}}\left( {{{11} \over 6}} \right)$$
B
88 A and $${\tan ^{ - 1}}\left( {{{11} \over 6}} \right)$$
C
0.88 A and $${\tan ^{ - 1}}\left( {{{11} \over 6}} \right)$$
D
8.8 A and $${\tan ^{ - 1}}\left( {{{6} \over 11}} \right)$$
2
JEE Main 2021 (Online) 25th July Evening Shift
+4
-1
A 10 $$\Omega$$ resistance is connected across 220V $$-$$ 50 Hz AC supply. The time taken by the current to change from its maximum value to the rms value is :
A
2.5 ms
B
1.5 ms
C
3.0 ms
D
4.5 ms
3
JEE Main 2021 (Online) 22th July Evening Shift
+4
-1
In a circuit consisting of a capacitance and a generator with alternating emf Eg = Eg0 sin$$\omega$$t, VC and IC are the voltage and current. Correct phasor diagram for such circuit is

A
B
C
D
4
JEE Main 2021 (Online) 22th July Evening Shift
+4
-1
Match List - I with List - II

List - I List - II
(a) $$\omega L > {1 \over {\omega C}}$$ (i) Current is in phase with emf
(b) $$\omega L = {1 \over {\omega C}}$$ (ii) Current lags behind the applied emf
(c) $$\omega L < {1 \over {\omega C}}$$ (iii) Maximum current occurs
(d) Resonant frequency (iv) Current leads the emf

Choose the correct answer from the options given below
A
a(ii), b(i), c(iv), d(iii)
B
a(ii), b(i), c(iii), d(iv)
C
a(iii), b(i), c(iv), d(ii)
D
a(iv), b(iii), c(ii), d(i)
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