What is difference between Section 3 of Indian Evidence Act & Section 114 of the same Act???

Mujhe lagta hai ki dono hi ek jaisi hain lekin to maine 3 aur 114 dono ke liye alag-alag questions pehli baar mein tryout kiya. Kya yeh 2 section alag-alag cheezon ka evidence dene mein help karte hain ya kuch aur? Aur Section 114 ke under kya hain aise 8 rules jo kuch to clear hi nahi hain mujhe. Kya koi bhai bata sakta hai difference, aur yeh 8 rules 114 ke under kya hain?