How is a voltmeter connected in the circuit to measure the potential difference between two points?

How much work is done in moving a charge of $2 \ C$ from a point at $118 \ V$ to a point at $128 \ V$ (in $J$)?

Which of the following formulas represents voltage $(V)$?

How can we maintain a potential difference across a conductor?

Which of the following has the unit $volt$?

If $2 \times 10^{-3} \text{ J}$ of work is done in moving a particle carrying a charge of $10 \times 10^{-6} \text{ C}$ from infinity to a point $P$, what will be the potential at the point $P$ (in $\text{ V}$)?