Question

A wire of a given material has length "I' and resistance "R". Another wire of the same material having three times the length and twice the area of cross section will have a resistance equal to:

• A. 3R
• B. 1/2 R
• C. 2/3 R
• D. 3/2 R

Answer 1

Answer:

D. 3/2 R

• The resistance of the new wire is 3/2 R or 1.5 times the original resistance