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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
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2013
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Q)
In an LCR circuit as shown below both switches are open initially. Now switch
S
1
is closed,
S
2
kept open. (q is charge on the capacitor and
τ
=
R
C
is capacitive time constant). Which of the following statement is correct? <br>
( A ) At
t
=
2
τ
,
q
=
C
V
(
1
−
e
−
2
)
( B ) At
t
=
τ
,
q
=
C
V
/
2
( C ) At
t
=
τ
2
,
q
=
C
V
(
1
−
e
−
1
)
( D ) Work done by the battery is half of the energy dissipated in the resistor.
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