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At constant temp.& pressure,on the same circuit,with potential difference unchanged,current reduces if resistance increases.(Ohm's law).
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoCurrent increases
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If current goes down in an electrical circuit and voltage remains the same what will happen to resistance?
v = i*RIf i goes down then R must go up (assuming v remains the same).AnwerCompletely impractical question. Resistance is not directly affected by voltage or current, so what you describe won't happen!
Will current travel along the path with the highest resistance?
Current goes path of least resistance. But if u have two resistances in paralell only the majority will go through the smaller resistance some Porportional Amount will "flow" through the larger resistor. Depends on resistance sizes and voltage slap plied as to how much current
What is the relationship between lamp brightness and resistance in a series circuit?
The higher the resistance the dimmer the light will become. The voltage drop (current) is proportional to the resistance as seen in the equation V=IR, since voltage remains the same throughout a series circuit if the equivalent resistance goes up the amount of current reaching the lightbulb must go down to equal the voltage thus creating a dimmer lightbulb.
What happens to a circuit if the resistances is increased?
The voltage drop across each resistance will go up, and the current through the circuit will go down.
Where does earthing current go?
it takes the lowest resistance path back to the current source Answer: Earth leakage current flows down to earth through the consumer earth continuity conductor.
What happens when you have low resistance?
When you have low resistance, it means that it is easier for you to go. If there is not as much as resistance with something holding you back,?æthen you can go faster, and not be held back.
How can you maintain a constant 13.5 volts DC at 20 amps even though the circuit will demand more amps as the temperature increases?
If the question asks how 13.5 volts can be supplied to a device that draws 20 amps (nominally), the supply responds to the setpoint selected (13.5 volts). The supply's voltage has the ability to actually change as the dynamic resistance of the device it supplies changes. That's weird because we want the voltage to stay the same. The supply is actually changing the amount of current it supplies as the resistance of the load changes, and this will keep the applied voltage fixed at 13.5 volts. How does that work? We know that for a given resistance, if we wish to supply a constant voltage, we will get a fixed amount of current draw. As the resistance changes (goes down) due to thermal effects, the supply will actually deliver more current to maintain the 13.5 volts. In this way, the supply can accomplish voltage regulation. It's classic Ohm's law. The volts equals the current times the resistance. If voltage is to remain constant, then the current times the resistance will have to remain constant. The onlyway this can happen is that as resistance goes down, current must go up. As the device heats up and its dynamic resistance decreases, the current it "demands" to keep the supplied voltage at the 13.5 volts goes up. The supply does all this automatically.
Does wattage change as voltage change?
It depends by how much it changes. Power (watts) = current (amps) x voltage If the current halves and the voltage doubles, the power won't change. But if the current is cut in half and the voltage only goes up by a little bit the watts will go down. If the current only goes down a little bit but the voltage doubles, then the watts will go up.
What happens to the current in a circuit if the resistance is increased?
current is the movement of charg carriers (normaly electrons) through a conductive material. the easyest way to think about it is that voltage is like a force pushing on the electrons, and resistance will push back against this. Current is then the result of these two factors. This is where we get the equation voltage=current*resistance. In answer to your question, increasing the circuit resistance will decrease the current in the circuit, as long as the supply voltage stays the same.
What happens to an electric current when the wire is made smaller?
Electric current as we usually describe it is the flow of electrons. Current is caused to flow by voltage, which can be looked at as "electrical pressure" that forces electrons to move. Currents can be made smaller or larger by decreasing the voltage across a fixed amount of resistance. As resistance is the quality of "resisting" or "limiting" current flow, we can change resistance to change current. For a give voltage, if we increase the resistance, we can make the current smaller, and if we decrease it, we can make current larger. In electronics, voltage equals current times resistance. E = I x R Also true is that current is equal to voltage divided by resistance. I = E/R As current equals volts divided by resistance, if we change one of them without changing the other, current will change. And in increase in voltage (with no change to resistance) will cause current to go up. The opposite is also true. Also, if we increase resistance (with no change in voltage), current will go down. And the opposite is true here, too.
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