Question

While working on a physics project at school physics lab, you require a $4\mu F$ capacitor in a circuit across a potential difference of $1kV$. Unfortunately, $4\mu F$ capacitors are out of stock in your lab but $2\mu F$ capacitors which can withstand a potential difference of $400V$ are available in plenty. If you decide to use the $2\mu F$ capacitors in place of $4\mu F$ capacitor, minimum number of capacitors required are

• A. 16
• B. 18
• C. 20
• D. 12

Answer 1

Answer: (B)

$C_{AB}=\frac{2}{3}$
Total number of benches $=\frac{2/4\times 3}{/2}=6$
Total number of capacitors $=6\times 3=18$