What is the other name of the commercial unit of electrical energy?

Of which physical quantity is the $joule/coulomb$ a unit?

Two resistors of resistance $2 \,\Omega$ and $4 \,\Omega$ when connected to a battery will have:

$1 \, \mu A = \ldots \ldots \ldots \, A$

According to Ohm's law,which of the following statements is correct?

In an electrical circuit,three incandescent bulbs $A, B$ and $C$ of rating $40 \, W, 60 \, W$ and $100 \, W$ respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness?