What is one henry?

What is one bar?

A coil has inductance of 5 henry and resistance 20 ohm. An e.m.f. of 100 volt is applied to it. What is the energy stored in the magnetic field, when the current has reached its final steady value?

What is one mole of an element ?

What is one torr of pressure?

What is one Pico farad?

What is one picofarad?