Bought stocks of jppower today, can we sell it in next trading day?

Yes, you can sell as BTST (Buy Today ans Sell Tomorrow).

JPPOWER is trading as EQ caregory, so no problem with that.

But you should know the consequence of BTST before doing it.

There is a small chance of you entering auction and short delivery.

For details read this one in detail,

For additional details on BTST, refer this link