A cylindrical wire is measured using a screw gauge. Its corrected diameter is d and length is L. Which statements are correct?

Select all that apply

• Option A

  Cross-sectional area is πd²/4.

• Option B

  For fixed resistivity and length, resistance varies as 1/d².

• Option C

  A 1% error in diameter produces approximately 2% error in calculated area.

• Option D

  A 1% error in diameter produces approximately 1% error in calculated resistance.