Question

a torch bulb and a cell have two terminals. in which case the two terminals are not marked positive and negative?​

Answer 1

A torch .
That’s because it doesn’t matter which way you connect .
But for cell or battery it matters .
Because the flow of charges ( electrons) are determined by it .
Hope this answer helps you.

Answer 2

In the case of a torch bulb the two terminals are not marked positive and negative.