Why the current decreases with increase in voltage in transmission lines? But according to Ohm's law current should increase with Voltage [closed]

Is the Ohm's law violated here? And also why is electricity generated at 11,000 V in India?

closed as unclear what you're asking by DanielSank, stafusa, Jon Custer, John Rennie, Kyle KanosNov 21 '17 at 11:13

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

• This is a repost of another question by the same user. – DanielSank Nov 20 '17 at 6:52
• @DanielSank You got it the wrong way around - this here is the older question, the other is the repost. – ACuriousMind Nov 20 '17 at 12:54

The current required to carry a given power decrease when you increase the voltage because the power is the product of the current with the voltage (and power factor).

Is the Ohm's law violated here?

No, the Ohm's law is not violated since Ohm's law relates the voltage across ('between the ends') of a conductor to the current through the conductor.

But the voltage on a transmission line (the voltage referenced to ground) is not the voltage across the transmission line (the voltage difference between the ends of the transmission line).

To apply Ohm's law correctly requires understanding which voltage and current are related by it.

As given in another answer, for a given power, we require that the product of the transmission line voltage and current is constant. So, holding the power constant, an increase in voltage results in a decrease in current.

Since the ohmic losses in a transmission line are proportional the square of the current, reducing the current by 50% cuts the power loss by 75%.

as per the formul;I=P/V......SO if we keep the value of 'P' CONSTANT AND VARRY THE VALUE OF 'V'then we get the value of i will less.on the other hand ohms law applicable only in a particular conductor's two end......and should have fix impedance.In transmission line we are using transformer and it doesn't have fixed impedance becoz we always doing stepup and step down to the power.