Option writing call put

How much balance required to sell one call or put of nifty

If I sell one lot of nifty @ 11500 pe n nifty goes above 11500 the

You can check margin requirement here here.

When you sell a Put Option, you are bullish on underlying, so when Nifty moves above 11500, you will be making profit, if Nifty moves below 11500 you will be making loss.

Futures and Options are high risk instruments, request you read this module on Varsity and get better understanding about Options before trading.