The gap between any two rails each of length l laid on a railway trach equals x at `27^@C` When the
Channel: Doubtnut
Date: 2020-07-26

The gap between any two rails each of length l laid on a railway trach equals x at `27^@C` When the temperature rises to `40^@C` the gap closes up. The coefficient of linear expansion of the material of the rail is `alpha`. The length of a rail at `27^@C` will be