The area of cross section of a wire becomes half when its length is stretched to double. How the resistance of the wire is affected in the new condition?
A. Resistance of the wire remains unchanged
B. Resistance of the wire decreases to half
C. Resistance of the wire increases to double
D. Resistance of the wire increases four times
Answer:D
The area of cross section of a wire becomes half when its length is stretched to double. How the resistance of the wire is affected in the new condition?
A. Resistance of the wire remains unchanged B. Resistance of the wire decreases to half C. Resistance of the wire increases to double D. Resistance of the wire increases four times