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CBSE Class 12-science Answered

Calculate the total registance if 40 ohm & 40 ohm are connected in parallel
Asked by Amlanbehera17 | 13 Nov, 2018, 07:38: PM
answered-by-expert Expert Answer
If two resistors R1 and R2 are connected parallel, then the equivalent resistance Re is given by
 
begin mathsize 12px style 1 over R subscript e space equals space 1 over R subscript 1 plus 1 over R subscript 2 space space o r space space space space R subscript e space end subscript equals space fraction numerator R subscript 1 cross times R subscript 2 over denominator R subscript 1 plus R subscript 2 end fraction end style ..........................(1)
If R1 = R2 = R , then using the above formula, we get Re = R/2 .
 
Hence if two 40Ω resistors are connected parallel, then we get 20Ω as equivalent resistance.
Answered by Thiyagarajan K | 13 Nov, 2018, 08:49: PM

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