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The specific resistance of manganin is . The resistance of a cube of length 50m will be: The…

Physics20222 marksShort answer
The specific resistance of manganin is $50 \times 10^{-8}\ \Omega\text{ m}$.
(i)[1.0]
The resistance of a cube of length 50m will be:
  • (a)$10^{-6}\ \Omega$
  • (b)$2.5 \times 10^{-5}\ \Omega$
  • (c)$10^{-8}\ \Omega$
  • (d)$50 \times 10^{-8}\ \Omega$
(ii)[1.0]
The specific resistance of the combination of two cubes of length 50m in series will be:
  • (a)$10^{-6}\ \Omega\text{ m}$
  • (b)$2.5 \times 10^{-5}\ \Omega\text{ m}$
  • (c)$2 \times 10^{-6}\ \Omega\text{ m}$
  • (d)$50 \times 10^{-8}\ \Omega\text{ m}$

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Current Electricity

From ISC 2022 Specimen Physics Paper 1, question 41.