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Byju's Answer
Standard XII
Physics
Kirchhoff's Junction Law
The time cons...
Question
The time constant of the given circuit is:
A
RC
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B
2RC
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C
3RC
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D
4RC
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Solution
The correct option is
B
2RC
The equivalent resistance of the circuit,
R
e
q
=
R
×
R
R
+
R
+
R
=
R
2
+
R
=
3
R
2
As we know, time constant of CR- circuit,
τ
=
C
e
f
f
R
e
f
f
So for the given circuit,
τ
=
4
C
3
×
3
R
2
=
2
R
C
τ
=
2
R
C
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