1
JEE Main 2021 (Online) 27th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
A 100$$\Omega$$ resistance, a 0.1 $$\mu$$F capacitor and an inductor are connected in series across a 250 V supply at variable frequency. Calculate the value of inductance of inductor at which resonance will occur. Given that the resonant frequency is 60 Hz.
A
0.70 H
B
70.3 mH
C
7.03 $$\times$$ 10$$-$$5 H
D
70.3 H
2
JEE Main 2021 (Online) 27th July Morning Shift
MCQ (Single Correct Answer)
+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 $${\tan ^{ - 1}}\left( {{{6} \over 11}} \right)$$
3
JEE Main 2021 (Online) 25th July Evening Shift
MCQ (Single Correct Answer)
+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
4
JEE Main 2021 (Online) 22th July Evening Shift
MCQ (Single Correct Answer)
+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

JEE Main 2021 (Online) 22th July Evening Shift Physics - Alternating Current Question 84 English
A
JEE Main 2021 (Online) 22th July Evening Shift Physics - Alternating Current Question 84 English Option 1
B
JEE Main 2021 (Online) 22th July Evening Shift Physics - Alternating Current Question 84 English Option 2
C
JEE Main 2021 (Online) 22th July Evening Shift Physics - Alternating Current Question 84 English Option 3
D
JEE Main 2021 (Online) 22th July Evening Shift Physics - Alternating Current Question 84 English Option 4
JEE Main Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12