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Results tagged with voltage
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user 276576
Voltage is the unit of measurement for electronic potential, from one point location to another.
1
vote
Accepted
Can potential at the terminal of a resistor directly connected to negative terminal be non z...
So from point "a" to the connection we have a 10V voltage differential (the "output" of this part is a + 10V).
Than we have to 5V source and the 10 Ohm resistor. … We only care about the voltage drop on the 4 Ohm Resistor which is $30V * 4 Ohm / 6 Ohm$ so we're getting 12V on that one. But point b is 12V below the input of that part of the cicuit. …
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1
vote
Relationship between voltage amplitude and dissipated heat for current running across a resi...
So
$$
P = U^2 / R
$$
where U is the RMS-Value of the voltage applied.
For sinusodidial voltages, RMS is $Vrms = Vpeak /\sqrt{2}$ …
- 866
5
votes
Accepted
Is potential difference always required for current?
For one: removing a voltage source without breaking the circuit is very hard. But in theory, that would be how it works. …
- 866
25
votes
Accepted
Why is it easier to raise AC current to high voltage than DC?
Changing the Voltage of AC can be done with a simple iron core transformer. … Converting DC to another voltage takes more effort. One way is to drive a DC motor that is mechanically coupled with a DC generator. Such systems are big, have moving parts and have lower efficiency. …
- 866