JEE PHYSICS MCQ: CURRENT ELECTRICITY

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Application +4 | -1

Find the resistance of a copper coil of total wire-length

10 \mathrm{~m}

and area of cross section

1.0 \mathrm{~mm}^2

. What would be the resistance of a similar coil of aluminium? The resistivity of copper

=1.7 \times 10^{-8} \Omega \mathrm{m}

and that of aluminium

=2.6 \times 10^{-8} \Omega \mathrm{m}

View answer and explanation

Correct option: C

0.17 \Omega;\,\,0.26 \Omega

Option C (

0.17 \Omega;\\,0.26 \Omega

) is correct because it accurately calculates the resistance of the copper and aluminum coils using the given resistivity, length, and cross-sectional area.

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