Load Assetbundle

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class LoadAssets : MonoBehaviour {

IEnumerator Start()
{
string uri = Application.persistentDataPath  + "/myassetbundle";       
WWW www = new WWW (uri);
yield return www;
var bundle = AssetBundle.LoadFromFile(uri);
var prefab = bundle.LoadAsset<GameObject>("Sphere");
Instantiate(prefab);
}

}