1
JEE Main 2019 (Online) 8th April Evening Slot
+4
-1
A circuit connected to an ac source of emf e = e0sin(100t) with t in seconds, gives a phase difference of $$\pi$$/4 between the emf e and current i. Which of the following circuits will exhibit this ?
A
RC circuit with R = 1 k$$\Omega$$ and C = 1μF
B
RL circuit with R = 1k$$\Omega$$ and L = 1mH
C
RC circuit with R = 1k$$\Omega$$ and C = 10 μF
D
RL circuit with R = 1 k$$\Omega$$ and L = 10 mH
2
JEE Main 2019 (Online) 8th April Morning Slot
+4
-1
An alternating voltage v(t) = 220 sin 100 $$\pi$$t volt is applied to a purely resistance load of 50$$\Omega$$ . The time taken for the current to rise from half of the peak value to the peak value is :
A
5 ms
B
2.2 ms
C
3.3 ms
D
7.2 ms
3
JEE Main 2019 (Online) 12th January Evening Slot
+4
-1
In the above circuit, C = $${{\sqrt 3 } \over 2}$$$$\mu$$F, R2 = 20 $$\Omega$$, L = $${{\sqrt 3 } \over {10}}$$ H and R1 = 10 $$\Omega$$. Current in L-R1 path is I1 and in C-R2 path it is I2 . The voltage of A.C. source is given by, V = 200 $${\sqrt 2 }$$ sin (100 t) volts . The phase difference between I1 and I2 is :

A
150o
B
90o
C
30o
D
0o
4
JEE Main 2019 (Online) 12th January Morning Slot
+4
-1
In the figure shown, a circuit contains two identical resistors with resistance R = 5$$\Omega$$ and an inductance with L = 2mH. An ideal battery of 15 V is connected in the circuit. What will be the current through the battery long after the switch is closed ?

A
6 A
B
7.5 A
C
3 A
D
5.5 A
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