AP EAMCET · PHYSICS · Current Electricity
Two metal wires of same length, same area of crosssection have conductivities of their material \(\sigma_1\) and \(\sigma_2\). If they are connected in series, the effective conductivity is
- A \(\frac{\sigma_1 \sigma_2}{\sigma_1+\sigma_2}\)
- B \(\frac{2 \sigma_1 \sigma_2}{\sigma_1+\sigma_2}\)
- C \(\frac{\sigma_1 \sigma_2}{\sigma_1-\sigma_2}\)
- D \(\frac{\sigma_1 \sigma_2}{\sigma_1-\sigma_2}\)
Answer & Solution
Correct Answer
(B) \(\frac{2 \sigma_1 \sigma_2}{\sigma_1+\sigma_2}\)
Step-by-step Solution
Detailed explanation
If they are connected in series, then…
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