Two identical square rods of metal are welded end to end as shown in fig `(1)`. `20 cal` of heat
Channel: Doubtnut
Date: 2020-04-12

Two identical square rods of metal are welded end to end as shown in fig `(1)`. `20 cal` of heat flows through it in `4min`. If the rods are welded as shown in fig.`(2)`, the same amount of heat will flow through the rods in