Physics 9702 · AS & A Level · Resistance and resistivity

Resistance and resistivity — practice question

A metal wire has resistance $R$. It is stretched until its diameter falls to $94.0\%$ of its initial diameter. The wire’s volume remains unchanged. What is the resistance of the stretched wire?

  • A$1.06R$
  • B$1.13R$
  • C$1.20R$
  • D$1.28R$

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