AP EAMCET · PHYSICS · Current Electricity
Two wires of equal diameters, lengths and having resistivities respectively are joined in series. The equivalent resistivity of the combination is ____
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
Equivalent resistance for series combination is given by R=R1+R2 ⇒SltotalA=S1l1A+S2l2A ∴ ltotal=l1+l2 ⇒S=S1l1+S2l2l1+l1
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