What is the unit for work is called

The unit you should use for work done and energy is the joule (J) which is indeed the same as the newton metre (N m).

There is another physical quantity which is the product of force and distance and that is torque or moment of a force.

The unit you should use for torque is the newton metre (Nm) and not the joule.

Naming the units of work done and torque differently helps to emphasis the fact that work done and torque refer to two different physical quantities although the definitions of both quantities have the product of force and distance in them.

work done=force→⋅displacement→ and torque→=force→×displacement→

Hope I helped

Explanation :

According to Ohm's law current in a conductor between two points is directly proportional to the voltage across two points.

Mathematically,

Where,

V is the applied voltage.

I is current flowing.

R is resistance.

If the voltage increases, the current will increase because the voltage is directly proportional to the current.

Similarly, if resistance increases current will decrease because the current is inversely proportional to resistance.