Question

The resistance of a wire of length Land area of cross-section A is 1.0 Ω . The resistance of a wire of the same material, but of length 41 and area of cross-section 5A will be?

• A. 2.5 Ω
• B. 0.8 Ω
• C. 1.25 Ω
• D. 0.4 Ω

Answer 1

Answer:

B. 0.8 Ω

• The resistance of the wire with length 4L and cross-sectional area 5A is 0.8 Ω