what happens to the current when the voltage increases? Does the current increase too or decrease?
- formengLv 62 months ago
Voltage and current are related by Ohm's law which is V=IR. So, if the load (resistance if it's a resistive load, impedance if there are reactive elements ) remains the same, we have I=V/R which means that if the voltage increases the current increases and vice versa.
- Anonymous2 months ago
It depends on what the load is.
If the load resistance is fixed and purely resistive, then the load current will increase with increased voltage.
- derframLv 72 months ago
One of the more common examples of a load that does not follow ohms law when changing the input voltage is a switch mode power supply (SMPS). A lot of the modern wall worts are of this type. They will draw less current as the voltage increase such that the input power (E*I) remains about the same.
- How do you think about the answers? You can sign in to vote the answer.
- D gLv 72 months ago
it depends on the device .. a purely resistive device will do that but there are many other devices that act oddly
- PhilomelLv 72 months ago
If the resistance/impedance is linear it will increase.
If it is a GUNN diode (negative resistance) the current will decrease.
- qrkLv 72 months ago
Depends on the circuit.
The textbook answer for school is current will increase if voltage increases. This assumes a resistive load. I = E/R (Ohm's law) shows this.
Some circuits draw constant power, thus, current will decrease when voltage increases. You'll find this behavior with switching power supplies.
- billrussell42Lv 72 months ago
usually, in a linear circuit, current will increase. There are a few exceptions involving negative resistance.
- JohnLv 62 months ago
I=E/R Current increases, Volts increases. Ohms Law.