Question

12. The length of the wire is reduced by half. What will be the
effect on the increase in its length under a given load?
(a) Reduced by half (b) Increase by half
(c) Remains same
(d) None of these

with explanations.​

Answer 1

Answer:

=> IF THE LENGTH WILL BE INCREASED BY DOUBLE THEN AREA WILL REDUCE HALF AND NEW RESISTANCE WILL BE FOUR TIMES OF ITS OLD RESISTANCE.

=> IF THE LENGTH WILL BE REDUCED BY HALF THEN AND ITS AREA WILL INCREASED BY DOUBLE AND NEW RESISTANCE WILL BE FOUR TIMELESS FROM OLD RESISTANCE.