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Standard XII

Physics

Understanding Electrostatic Potential

An electric c...

Question

An electric circuit requires a total capacitance of $2 μ F$ across potential of $1000 V$ . Large number $1 μ F$ capacitances are available each of which would breakdown if the potential is more than $350 V$ How many capacitances are required to make the circuit.

24

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Solution

The correct option is B $20$
$\begin{matrix} C_{t o t a l} = 2 μ F v = 1000 v N u m b e r o f c a p a c i t o r i n s e r i e s = \frac{1000}{30} ≃ 3 (2.8) C_{s e r i e s} = \frac{1}{3} N o w, 2 = P \times \frac{1}{3} P = 6 (i n p a r a l l e l) t o t a l n u m b e r o f c a p a c i tan c e = 3 \times 6 = 18 ∴ o p t i o n C i s c o r r e c t a n s w e r . \end{matrix}$

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An electric circuit requires a total capacitance of 2μF across potential of 1000V . Large number 1μF capacitances are available each of which would breakdown if the potential is more than 350V How many capacitances are required to make the circuit.

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An electric circuit requires a total capacitance of $2 μ F$ across potential of $1000 V$ . Large number $1 μ F$ capacitances are available each of which would breakdown if the potential is more than $350 V$ How many capacitances are required to make the circuit.