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$1.28R$
Physics 9702 · AS & A Level · Resistance and resistivity
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?