ExamBro
ExamBro
enEnglishguગુજરાતી
GUJCET · Physics · Current Electricity

તાંબાના ત્રણ તારના દળનો ગુણોત્તર \(1: 3: 5\) છે અને તેમની લંબાઈનો ગુણોત્તર \(5: 3: 1\) છે. તેમના વિદ્યુત અવરોધનો ગુણોત્તર _______ હશે.

  1. A \(5: 3: 1\)
  2. B \(\sqrt{125}: 15: 1\)
  3. C \(1: 15: 125\)
  4. D \(1: 3: 5\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(1: 15: 125\)

Step-by-step Solution

Detailed explanation

\(R =\frac{\rho l}{A}=\frac{\rho l^2}{A l}=\frac{\rho l^2}{V}\)
\({ll}\therefore R =\frac{\rho l^2}{m} d\left(\because \text { volume } V =\frac{m}{d}\right) \\ \therefore R \alpha \frac{l^2}{m} \\ \therefore R _1: R _2: R _3\)
\({l}=\frac{(1)^2}{5}: \frac{(3)^2}{3}: \frac{(5)^2}{1} \\ R_1: R_2: R_3=\frac{1}{5}: 3: 25 \\ R_1: R_2: R_3=1: 15: 125\)
Same subject
Explore more questions on app
From GUJCET
Explore more questions on app