1
JEE Main 2018 (Offline)
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
For an RLC circuit driven with voltage of amplitude vm and frequency $${\omega _0}$$ = $${1 \over {\sqrt {LC} }}$$ the current exhibits resonance. The quality factor, Q is given by :
A
$${{CR} \over {{\omega _0}}}$$
B
$${{{\omega _0}L} \over R}$$
C
$${{{\omega _0}R} \over L}$$
D
$${R \over {\left( {{\omega _0}C} \right)}}$$
2
JEE Main 2018 (Online) 15th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
An ideal capacitor of capacitance $$0.2\,\mu F$$ is charged to a potential difference of $$10$$ $$V.$$ The charging battery is then disconnected. The capacitor is then connected to an ideal inductor of self inductance $$0.5$$ $$mH.$$ The current at a time when the potential difference across the capacitor is $$5$$ $$V,$$ is :
A
$$0.34\,\,A$$
B
$$0.25\,\,A$$
C
$$0.17\,\,A$$
D
$$0.15\,\,A$$
3
JEE Main 2017 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A sinusoidal voltage of peak value 283 V and angular frequency 320/s is applied to a series LCR circuit. Given that R=5 $$\Omega $$, L=25 mH and C=1000 $$\mu $$F. The total impedance, and phase difference between the voltage across the source and the current will respectively be :
A
10 $$\Omega $$ and tan$$-$$1 $$\left( {{5 \over 3}} \right)$$
B
$$7\,\Omega $$ and 45o
C
$$10\,\Omega $$ and tan$$-$$1$$\left( {{8 \over 3}} \right)$$
D
$$7\,\Omega $$ and tan$$-$$1$$\left( {{5 \over 3}} \right)$$
4
JEE Main 2016 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A series LR circuit is connected to a voltage source with
V(t) = V0 sin$$\Omega $$t. After very large time, current I(t) behaves as
(t0 >> $${L \over R}$$) :
A
JEE Main 2016 (Online) 9th April Morning Slot Physics - Alternating Current Question 128 English Option 1
B
JEE Main 2016 (Online) 9th April Morning Slot Physics - Alternating Current Question 128 English Option 2
C
JEE Main 2016 (Online) 9th April Morning Slot Physics - Alternating Current Question 128 English Option 3
D
JEE Main 2016 (Online) 9th April Morning Slot Physics - Alternating Current Question 128 English Option 4
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