Physics 0625 · IGCSE · Electrical quantities

Electrical quantities — practice question

Nichrome wire P is $1.0\,\text{m}$ long and has a diameter of $1.0\,\text{mm}$. Nichrome wire Q is $2.0\,\text{m}$ long and has a diameter of $2.0\,\text{mm}$. Which statement gives the correct comparison of the resistance of Q with the resistance of P?

  • AThe resistance of Q is one-quarter the resistance of P.
  • BThe resistance of Q is one-half the resistance of P.
  • CThe resistance of Q is the same as the resistance of P.
  • DThe resistance of Q is four times the resistance of P.

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