Electric current is the flow of electrons. So, it should flow from the negative to the positive terminal. But my teachers say that the conventional direction of the current flow is high (positive terminal) to low (negative terminal) potential. Which statement is true? If both are true, then why? And please explain to me the difference between Direct and Alternating current. Please help, my exams are coming.  

Asked by hitmanilst1212 | 18th Feb, 2022, 02:09: PM

Expert Answer:

The flow of electrons is termed electron current. Electrons flow from the negative terminal to the positive.
Conventional current or simply current, behaves as if positive charge carriers cause current flow.
Conventional current flows from the positive terminal to the negative.
Difference between Direct and Alternating current.
Direct current:
i) Voltage of the direct current cannot travel at large distnaces.
ii) Frequency of direct current is zero. 
iii) Direct current flows in one direction. 
iv) It can be obtained through cell or battery.  
Alternating current: 
i) Alternating current is safe to transfer over a long distances.
ii) Frequency of AC is 50 Hz or 60 Hz. It differs from country to country. 
iii) It reverses its direction while flowing.
iv) it can be obtained through ac generator or mains. 

Answered by  | 18th Feb, 2022, 02:31: PM