Hence, the voltage through transmission lines is very high, which reduces the current, which in turn minimizes the energy lost through transmission. This is why alternating current is preferred over direct current for transmitting electricity, as it is much cheaper to change the voltage of an alternating current.
Is AC or DC better for long distance transmission?
High-voltage direct current (HVDC) technology offers several advantages compared to alternating current transmission systems. … “If the transmission line route is longer than about 300 miles, DC is a better option because AC lines have more line losses than DC for bulk power transfer.”
Why is AC preferred over DC Class 10?
AC voltage is preferred over DC voltage because it is economical and less complicated. AC voltage is more efficient than DC since minimum energy loss happens during transmission.
Why is AC signal conditioning preferred over DC?
Due to following reasons, AC systems are preferred over DC systems: a. It is easy to maintain and change the voltage of AC electricity for transmission and distribution. … From power stations, AC is produced so it is better to use AC then DC instead of converting it.
Why DC current is not used in homes?
Direct current is not used at home because for the same value of the voltage, DC is more lethal than AC since direct current does not go through zero. Electrolytic corrosion is more an issue with direct current. DC inductors are more complicated. It requires commutators, electronic switches and brushes.
Why is DC not used for long distance transmission?
Hence, the voltage through transmission lines is very high, which reduces the current, which in turn minimizes the energy lost through transmission. … However, there is a limit at which it is no longer advantageous to use alternating current over direct current (see HVDC transmission).
What are the advantages of AC over DC?
Because of the high voltages that can be generated, AC can be transmitted over long distances. Long-range transmission results in relatively low energy losses resulting from resistance. AC is cheaper to generate than DC. AC can be easily converted to DC if required.
Why does polarity change in AC?
As the wire spins and periodically enters a different magnetic polarity, the voltage and current alternate on the wire. This current can change direction periodically, and the voltage in an AC circuit also periodically reverses because the current changes direction.
Why AC power is used for distribution?
Alternating Current is used for electric power distribution because it can easily be transformed to a higher or lower voltage. Electrical energy losses are dependent on current flow. … The voltage can also be stepped down again so it is safe for domestic supply.