High voltage is used because it allows for efficient transmission of electrical energy over long distances. This is because high voltage results in lower current, which in turn reduces energy loss due to resistance in the wires. Additionally, high voltage is safer for humans as it is less likely to cause electric shock.
Voltage and current are directly proportional to each other according to Ohm's Law. This means that as voltage increases, current also increases and vice versa. However, the amount of current that flows is dependent on the resistance of the circuit, which can be controlled by adjusting the voltage.
Yes, high current can be used in some cases, but it is not as efficient as high voltage. High current results in more energy loss due to resistance, which can lead to overheating and potential damage to the system. It is also more dangerous for humans as it can cause severe electric shocks.
High voltage can improve the performance of electrical devices as it allows for faster and more efficient flow of electricity. This can be beneficial for devices that require large amounts of power, such as motors and appliances. However, too high of a voltage can also damage or destroy sensitive electronic components.
One potential disadvantage of using high voltage is the increased risk of electrical arcing, which occurs when electricity jumps between two conductors. This can lead to electrical fires and damage to equipment. Additionally, high voltage systems require more insulation and safety precautions, which can increase the cost of installation and maintenance.