1
JEE Main 2024 (Online) 1st February Morning Shift
+4
-1
A parallel plate capacitor has a capacitance $\mathrm{C}=200~ \mathrm{pF}$. It is connected to $230 \mathrm{~V}$ ac supply with an angular frequency $300~ \mathrm{rad} / \mathrm{s}$. The rms value of conduction current in the circuit and displacement current in the capacitor respectively are :
A
$14.3 ~\mu \mathrm{A}$ and $143 ~\mu \mathrm{A}$
B
$13.8 ~\mu \mathrm{A}$ and $13.8 ~\mu \mathrm{A}$
C
$13.8 ~\mu \mathrm{A}$ and $138 ~\mu \mathrm{A}$
D
$1.38 ~\mu \mathrm{A}$ and $1.38 ~\mu \mathrm{A}$
2
JEE Main 2024 (Online) 1st February Morning Shift
+4
-1
In series LCR circuit, the capacitance is changed from $C$ to $4 C$. To keep the resonance frequency unchanged, the new inductance should be:
A
increased by $2 \mathrm{~L}$
B
reduced by $\frac{1}{4} \mathrm{~L}$
C
reduced by $\frac{3}{4} \mathrm{~L}$
D
increased to $4 \mathrm{~L}$
3
JEE Main 2024 (Online) 31st January Evening Shift
+4
-1

An AC voltage $$V=20 \sin 200 \pi t$$ is applied to a series LCR circuit which drives a current $$I=10 \sin \left(200 \pi t+\frac{\pi}{3}\right)$$. The average power dissipated is:

A
21.6 W
B
200 W
C
173.2 W
D
50 W
4
JEE Main 2024 (Online) 30th January Evening Shift
+4
-1

An alternating voltage $$V(t)=220 \sin 100 \pi t$$ volt is applied to a purely resistive load of $$50 \Omega$$. The time taken for the current to rise from half of the peak value to the peak value is:

A
7.2 ms
B
3.3 ms
C
5 ms
D
2.2 ms
EXAM MAP
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