Leverages

I still don't understand why a smaller leveraged account is recommended for beginners than a large one,except that the smaller one can be regarded as an aid to your risk management.This advantage to me has been nullified by the fact that one can still use smaller pip values for his tradings in a large one. please can you throw more light on this.

Who recommends that?I beliebe newbie traders simply don't have money for bigger accounts.

Absolute value. When you finally learn to trade, you'll want every penny you can get to trade with; you can only realistically earn so much a week on trading, and more capital gives you a better chance to live off it.
So, demo and/or pennies while a rookie. And, expect to lose several accounts then.

(Learned the above the wrong way, while still a rookie.)