Question

why is difference of duration of day and night more in Jammu and Kashmir than in Tamilnadu?

Answer 1

The day and night are almost of same duration at the equator. kanyakumari is near the equator at 8*4'N with one hour day-night difference only which is hardly noticeable.

On the other hand, as we move away from the equator to the poles the variations in duration in day and night become greater. As Kashmir is over 30* away from the equator and so the difference in duration of day and night is more there and we feel that difference.