Question

What is the SI and CGS unit of emf?

Answer 1

The unit of electromotive force (emf) in both the SI (International System of Units) and CGS (Centimetre-Gram-Second) systems is based on the same physical concept, but they differ in scale and definition.

SI Unit of emf:

1. The SI unit of emf is the volt (V).
   

1. 1 volt = 1 joule per coulomb (J/C).
   

1. The volt is derived from the SI base units of electric potential, energy, and charge.
   

CGS Unit of emf:

1. The CGS unit of emf is the statvolt (abbreviated as "esu of potential").
   

1. 1 statvolt = 299.792458 millivolts (mV) or approximately 0.2998 mV.
   

In simple terms:

1. In SI, the emf is measured in volts, which is a more commonly used and larger unit.
   

1. In CGS, the emf is measured in statvolts, which is a much smaller unit compared to volts.