Physics 5054 · O Level · Resistance

Resistance — practice question

Copper wire X has resistance $R$. A second copper wire, Y, is twice as long and has half the cross-sectional area of X. What is the resistance of Y?

  • A$\frac{R}{2}$
  • B$R$
  • C$2R$
  • D$4R$

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI