1
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

A series LCR circuit with inductance 10 H, capacitance 10 $$\mu$$F, resistance 50 $$\Omega$$ is connected to an ac source of voltage, V = 200sin(100t) volt. If the resonant frequency of the LCR circuit is v0 and the frequency of the ac source is v, then

A
$${v_0} = v = 50$$ Hz
B
$${v_0} = v = {{50} \over \pi }$$ Hz
C
$${v_0} = {{50} \over \pi }$$ Hz, $$v = 50$$ Hz
D
$$v = 100$$ Hz, $${v_0} = {{100} \over \pi }$$ Hz
2
NEET 2021
MCQ (Single Correct Answer)
+4
-1
An inductor of inductance L, a capacitor of capacitance C and a resistor of resistance 'R' are connected in series to an ac source of potential difference 'V' volts as shown in figure. Potential difference across L, C and R is 40V, 10V and 40V, respectively. The amplitude of current flowing through LCR series circuit is 10$$\sqrt 2$$ A. The impedance of the circuit is :

A
5$$\Omega$$
B
4$$\sqrt 2$$ $$\Omega$$
C
5/$$\sqrt 2$$ $$\Omega$$
D
4$$\Omega$$
3
NEET 2021
MCQ (Single Correct Answer)
+4
-1
A capacitor of capacitance 'C', is connected across an ac source of voltage V, given by

V = V0sin$$\omega$$t

The displacement current between the plates of the capacitor, would then be given by :
A
$${I_d} = {V_0}\omega C\sin \omega t$$
B
$${I_d} = {V_0}\omega C\cos \omega t$$
C
$${I_d} = {{{V_0}} \over {\omega C}}\cos \omega t$$
D
$${I_d} = {{{V_0}} \over {\omega C}}\sin \omega t$$
4
NEET 2021
MCQ (Single Correct Answer)
+4
-1
A step down transformer connected to an ac mains supply of 220 V is made to operate at 11 V, 44W lamp. Ignoring power losses in the transformer, what is the current in the primary circuit ?
A
4A
B
0.2A
C
0.4A
D
2A
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