- #1
Fatima Hasan
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Homework Statement
Homework Equations
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The Attempt at a Solution
Could anyone check my answer please ?
gneill said:Why are you taking ##R_1## and ##R_2## to be in parallel? Here's what your circuit looks like after your ∇ to Y transformation:
View attachment 232843
Total resistance is the overall opposition to the flow of electric current in a circuit. It is important to calculate because it helps us determine the amount of current that will flow through a circuit and how much power will be consumed by the circuit components.
In a series circuit, total resistance is the sum of individual resistances. This means that you add up all the resistances in the circuit to get the total. Mathematically, it can be represented as: Rtotal = R1 + R2 + R3 + ... + Rn
In a parallel circuit, total resistance is calculated differently. The reciprocal of total resistance is equal to the sum of the reciprocals of individual resistances. This can be represented as: 1/Rtotal = 1/R1 + 1/R2 + 1/R3 + ... + 1/Rn
Total resistance is measured in ohms (Ω), which is the SI unit for electrical resistance. It is named after German physicist Georg Ohm, who first discovered the relationship between voltage, current, and resistance in an electrical circuit.
No, total resistance can never be negative. Resistance is a physical property of a material and it cannot be negative. However, in some cases, the calculated value of total resistance may appear negative due to incorrect calculations or using the wrong formula. In such cases, it is important to double check the calculations and formulas used.