Nov 10, 2017 · Current is the number or amount of electrons passing a given point at any one time. Resistors do just what their name says; they resist. You can use them to limit either current or …

According to Ohm's law, resistance varies directly with voltage You should read this the other way. Voltage varies directly with current. "R" is the constant of proportionality telling how much it varies. If …

Jan 4, 2024 · Someone is telling me that the resistor alone will decrease the energy the circuit uses. My understanding is that resistors only drop the current and dissipates current as heat and are therefore …

Oct 11, 2022 · I want to know whether a resistor slows down the speed of current or cause a voltage drop or both simultaneously.

Oct 17, 2023 · Bias resistor The simple way to set the 5 V quiescent output voltage is to pass a current determined by a resistor Rb through the base-emitter junction of the transistor. Undisturbed circuit: …

Mar 20, 2012 · The resistor does this. To drop 6V at 20 mA the resistor needed is R = V/I = 6 / 0.02 = 300 ohms. In this example a 9V battery + a resistor + an LED will operate at 20 mA. The resistor can …

Feb 15, 2020 · I am trying to understand the basics of electronics and I often come across the terms pull-up and pull-down resistors. From what I understand these resistors help the switching logic …

I have been very confused with resistors because I have not found a great, although simple explanation about if resistors reduce or limit voltage. Also, I want a explinaton on why you subtract Vf f...

Jul 10, 2013 · How would one go about using a 12 V DC power source to power something which needs 4.5 V DC using resistors? Is there a way to determine how much adding a resistor would drop the …

Oct 5, 2017 · In common units: V = A Ω where A is the current thru the resistor on Amperes, Ω the resistance in Ohms, and V the EMF across the resistor in Volts. Depending on the circuit, the voltage …