Electrical engineer interview questions - basic electrical engineering

1.Define electric current ?

Electric current is the movement or flow of electrons through a conductive material

2.Define “emf” / Electromotive force?

In order to cause the ‘free’ electrons to drift in a given direction an electromotive force must be applied

The ‘emf’ is the driving force in an electric circuit .The symbol of ‘emf’ is E and the unit of measurement is the volt ‘V’

3.Define potential difference?

Whenever current flows through a circuit element in a circuit such as resistor,there will be a potential difference developed across it.The unit is ‘volt’

4.Define resistance

Resistance is the opposition to the current flow measured in ohms

- Expain ohms law

It states that the current in a resistive circuit is directly proportional to its applied voltage and inversely proportional to its resistance provided that all other factors remain constant

V=IR

6.Define power

Power is defined as rate of doing work .Unit is watts

P = W/t