Question

In which case there is maximum extension in the wire, if same force is applied on each wire

• A. L = 500 cm, d = 0.05 mm
• B. L = 200 cm, d = 0.02 mm
• C. L = 300 cm, d = 0.03 mm
• D. L = 400 cm, d = 0.01 mm

Answer 1

Answer: (D)

L = 400 cm, d = 0.01 mm

Answer 2

$l \propto \frac { L } { r ^ { 2 } }$ (Y and F are constant)

Maximum extension takes place in that wire for which the ratio of $\frac { L } { r ^ { 2 } }$ will be maximum