Questions
The time constant of shown RC circuit is :
a
RC2
b
RC
c
2 RC
d
4 RC
detailed solution
Correct option is C
τ=ReqC where Req = equivalent resistance across capacitor with short circuiting batteries (if any)Here, Req=2R P 2R 5R=2RSo, τ=2RCTalk to our academic expert!
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A copper wire of cross-sectional area 2.0 mm2 , resistivity , carries a current of 1 A. The electric field in the copper wire is
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