What is difference between Direct Current DC and Alternating Current? Which one is used to transmit long power over long distances? What is the frequency of the Power transmission in India?
Answers
In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically. The voltage in AC circuits also periodically reverses because the current changes direction.
Ac is used for transmitting long power over long distances Because AC is easy and cheap to transform from one voltage to another using transformers. High voltage means less amperage for the same power, meaning you can do with thinner wires. What's good for long-distance power transmission is high voltages. The higher the voltages. The higher the voltage, the lower the resistive losses in the cable
The voltage in India is 220 volts, alternating at 50 cycles (Hertz) per second.
The frequency is 50 hertz