While working on a physics project at school physics lab, you req… - Vidyadip

MCQ

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 $1 \,kV$. Unfortunately, $4 \,\mu F$ capacitors are out of stock in your lab but $2 \,\mu F$ capacitors which can withstand a potential difference of $400 \,V$ 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
$16$
✓
$18$
C
$20$
D
$12$

✓

Answer

Correct option: B.

$18$

b
(b)

$C_{A B}=\frac{2}{3}$

Total number of benches $=\frac{{ }^2 \not 4 \times 3}{\not 2}=6$

Total number of capacitors $=6 \times 3=18$

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