when current is passed through a step up transformer its voltage increases and current decreases but by ohms l

Question

law current should increase with voltage?can anyone please explain this contradiction.

Answer 1

As energy cannot be distried or created only transfermation from one type to another after drops at varies points during transfer.
In this case While input voltage is less and current is more.

To give meaning for transformer due to construction and design
of electrical transformer the objevt to get more voltage higher
has to be fed. Any energy pass thro.any object heat is
generated. When heat developed Resistance will increase.
At the same transformer wll also consum some energy.
During consumption that energy heat automatically develop.
So resistance willincrease and balanced inonepoint.
It depend upon the impedence which is collective form
inductance and capacitence.

I hope you get some clue from it to get fare result for your
question

Answer 2

It isn't a contradiction. The power remains the same (minus some inefficiency). If the power in is 1 Volt at 1Amp, that is 1 Watt (Volts times Amps equals Watts).

After going through a 2:1 step up transformer, the output will be 2 Volts at 1/2 Amp = 1 Watt.

It would be nice to get more power out, but that's just not the way things work.

Answer 3

You are transforming power. Since power = E x I, if E increases by a factor of 3, then I must decrease by a factor of 3 to conserve the power. In reality, there is some power loss due to heating the transformer, but this is roughly accurate.
10 volts at 10 amps is 100 watts
30 volts at 3.33amps is 100 watts

Answer 4

I think you read ohm's law wrong
voltage x current = watts

if you increase voltage, you reduce current because you have the same amount of power.

if a 2:1 transformer turned 110v to 220v, the current would be reduced by half. or more because nothing is 100% effecient, the transformer gets warm.

Answer 5

The case of a transformer is based on the concepts of conservation of Electrical power and flux linkage. Here the Ohm's law that u r speaking about can't be applied over the 2 arms of the transformer core.

Answer 6

due to resistance; voltage is directly proportionate to current.if iam sure