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CBSE Class 12-science Answered

please answer this
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Asked by Prashant DIGHE | 09 Mar, 2020, 10:07: PM
answered-by-expert Expert Answer
Charge on each capcitor at time t,  Q = E C { 1 - e-t/(2RC) }
 
Note that time constant is doubled due to parallel connection of capacitors .
 
E is EMF of battery,  C is capacitance of individual capacitors and R is resistance in the circuit.
 
begin mathsize 14px style Q space equals space left parenthesis space 6 space cross times space 2 space space right parenthesis space left square bracket space 1 space minus space e to the power of negative 0.2 cross times 10 to the power of negative 3 end exponent divided by left parenthesis space 100 space right parenthesis end exponent space right square bracket end style ...............(1)
using approximation e-x = 1 - x  , when x << 1,  above equation becomes,
 
Q = 12 × 2 × 10-6 C = 24 μC
Answered by Thiyagarajan K | 10 Mar, 2020, 10:12: AM

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