for parallel i use the formula 1/r1+1/r2+1/r3Orodruin said:
1/4 + 1/4 = 2 that's the total of the parallel resistors but from there i don't know how to add it to the sum of the series resistors to get the total answerOrodruin said:
This is not correct. There are three parallel resistors, not two.Vantom said:
its the same answer (2) as mineOrodruin said:
My point is that you quoted the computation wrong. Also, the answer is wrong because there are three resistors in parallel, not two. Also, there are not two 4 Ω resistors that are connected in parallel.Vantom said:
No. This is incorrect. Look up the definition of series and parallel.Vantom said:
so 2 Ω and 2 Ω and 4 Ω are in parallel and the 4 Ω alone is in seriesOrodruin said:
No. It is correct that the 2-2-4 combination is in parallel. However, you did not use the correct relation to get the equivalent resistance to replace that entire combination.Vantom said:
inverse 1/2 + 1/2 + 1/4 = 0.8Orodruin said:
A resistor is an electrical component that limits the flow of current in a circuit. It is typically made of a material that resists the flow of electrons, thus reducing the amount of current passing through it.
The resistance of a resistor can be calculated using Ohm's Law, which states that resistance (R) is equal to the voltage (V) divided by the current (I). In equation form, this is expressed as R = V/I.
Resistance is measured in ohms (Ω), which is the unit of electrical resistance. Other common units include kilohms (kΩ) and megohms (MΩ).
Resistors are often color-coded to indicate their resistance value. The color code can be determined by looking at the bands of color on the resistor. Each color represents a specific number, and the values can be combined to determine the overall resistance of the resistor.
Resistors serve several purposes in a circuit. They can be used to control the amount of current flowing through a circuit, to reduce the voltage in a circuit, or to divide the voltage in a circuit. They are also commonly used to protect other components from being damaged by excessive current.