Recent content by IanT

I = V/R implies that the current changes proportionally with the voltage. You would expect the current to be lower if the voltage is lower. Can I have an example of a set up where the voltage, current and resistance (if any) is known for both the primary and secondary? I don't see how this can...

I don't have a teacher and the wikipedia article on reactance is quite inaccessible. Maybe you could link me somewhere with a better explanation for it? I still don't get the answer for the second question from the OP. The voltage is transformed, but the power input = power output. Why is a...

Thanks for the replies. I don't have a problem with solving any problems from my textbook, I can usually do it with one equation or the other. I was just confused over an apparent contradiction between two equations. I think I'm understanding now. Can somebody explain more about how inductive...

If it's heavy enough you could use it as a doorstop.

I'm sorry but I don't understand. Let's say that the voltage is 1V and the current is 2A in the primary circuit and the voltage is 2 V and the current is 1A in the secondary circuit. This is consistent with Vp*Vs = Vs*Is. Since V = IR, in the primary circuit, 1V = 2A*R and in the secondary...

I am confused over something about voltage and current. A transformer increases/decreases the voltage in a circuit and does the opposite to the current. The current times the voltage has the same value before and after. This however, seems to go against the well known equation V = IR (the...