$Ampere - hour$ is a unit of
Quantity of electricity
Strength of electric current
Power
Energy
Why do we have different units for the same physical quantity ?
Which is not a physical quantity
The units of angular momentum are
The unit of Stefan's constant $\sigma $ is
A physical quantity is measured and its value is found to be $nu$ where $n = $ numerical value and $u = $ unit. Then which of the following relations is true