MCQ
$1V$ equals:
- A$1J$
- ✓$1 JC ^{-1}$
- C$1 CJ ^{-1}$
- D$1JC$
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$\left(\frac{1}{4 \pi \in_0}=9 \times 10^9 \mathrm{SI}\right.$ unit, mass of $\alpha$ particle $=$ $\left.6.72 \times 10^{-27} \mathrm{~kg}\right)$
