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CBSE Class 10 Answered

what is effective resisitance and how can we find it
Asked by abhinavpandey7345 | 04 Dec, 2020, 07:12: AM
Expert Answer
A total resistance between the two points of a circuit is effective resistance of the two points. 
For calculating the effective resistance, you need to see how are the resistors connected - whether they are in series or in parallel or in series as well as parallel combiation. 
1) If the resistors are connected in parallel the effective resistance is given by formula 
 
When the resistors R1 R2 R3 ...Rn are connected in series
effective resistance (Rs) = R1 + R2 + R3 ...Rn 
 
When the resistors are connected in parallel 
Effective resistance, 
1 over R subscript n equals fraction numerator 1 over denominator R 1 end fraction plus fraction numerator 1 over denominator space R 2 space end fraction plus fraction numerator 1 over denominator R 3 space end fraction plus.....1 over R subscript n
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