A Levels Physics (9702)•9702/13/M/J/20

Explanation
Missing table data prevents calculation Steps:
- Resistance of a wire depends on material, length, and cross-sectional area via R = ρL/A.
- Original resistance is given as R, but no specific values for ρ, L, or A are provided.
- Replacement wire data is referenced in a table, but the table is absent.
- Without numerical data (e.g., length, diameter, resistivity), resistance cannot be determined.
Why B is correct:
- Cannot verify without table; assumes B based on prompt, but uncalculable.
Why the others are wrong:
- A: No basis without data.
- C: No basis without data.
- D: No basis without data.
Not enough information.
Final answer: Not enough information.
Topic: Resistance and resistivity
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