Ohm's law states that I = V/R, where I is current in amperes, V is difference potential in volts, and R is resistance in ohms. If I goes up, by relation, either V increases or R drops or both occur. Correspondingly, R = V/I, so if V stays static and I increases, R must decrease.?æ
A negative resistance region is where the current goes up while the voltage goes down, or vice versa. This is a characteristic of the esaki or tunnel diode, when it is in its tunnel region.
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.
Yes. When the voltage drops and the power requirement (watts) stays the same, the amperage goes up.
Simply put, the purpose of a resistor is to 'resist' the flow of current. Ohm's Law tells us that for a given voltage, the larger the resistance, or value of that resistor, the lower the current that will flow. Ohm's Law states that I (current) = E (voltage) / R (resistance) - where current is measured in amps, voltage is measured in volts and resistance is measured in ohms.
Half that, or 2 amps. The basic rule in circuits is that voltage (E) equals current (I) times resistance (R). Here's how that expression of Ohm's law looks: E= I x R That means that current equals voltage divided by resistance, as is shown here: I = E / R This expression says that resistance is inversely proportional to current (with voltage staying the same). Further, if resistance goes up, current goes down. If resistance doubles (goes up by a factor of 2), which it does in the case specified in the question, then current is cut in half (goes down by a factor of 2). Half of 4 amps is 2 amps, and that's where the answer came from.
Ohms' law says if voltage stays constant resistance controls the current flow. Resistance goes up, current goes down. E/I*R.
A negative resistance region is where the current goes up while the voltage goes down, or vice versa. This is a characteristic of the esaki or tunnel diode, when it is in its tunnel region.
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!
Resistance in a wire causes a decrease in the flow of current. This is because resistance impedes the movement of charge carriers through the wire, leading to a reduction in the overall current. Ohm's Law (V = I x R) shows the relationship between voltage, current, and resistance in a circuit.
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It varies. On some items resistance goes up, some it goes down when temperature goes up.
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.
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.
Ohms Law: V = IR (or equivalently, I = V/R) if voltage is held constant, then when resistance goes up, current goes down, and vice-versa. Say for instance, the voltage is 10 Volts, and resistance is 5 Ohms. That means the current is 2 Amps. (2 = 10/5) If the resistance is raised to 10 Ohms, then the current drops to 1 Amp. (10 = 10/1)
Voltage is the electrical pressure in a circuitAmperes (amps) are the measure of electrical current in a circuitOhms are the measurements of resistance in a circuitCurrent is essentially how fast electrons are moving in a circuitResistance is what impedes the electrical current, and can be found in the wire or various loads in a circuitHope this helps!
It means opposite of any given element. e.g. The inverse of element "x" is 1/x. You can say that, for a given voltage, current is inversely proportional to resistance. This means that when resistance goes up by a factor of x, current goes down by a factor of x and vice versa.
Yes. When the voltage drops and the power requirement (watts) stays the same, the amperage goes up.