一内外半径分别为R1和R2的同心球形电容器，其间充满相对电常数<img src="https://static.zxtiku.com/wangke/imgs/topic/8945a552014e88f0291d2b1ef217d4d6.jpg"/>的电介质，当内球带电量为Q时，电容器中的储能为（） A. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/7a0c81c1a27216a167477df95397dce0.jpg"/> B. <br/> <img src="https://static.pphuashu.com/wangke/imgs/topic/8c61aeca2cec413e15149ad39f0d976a.jpg.png"/> C. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/22a25d2a5d953def00b8f9a8afd065ae.jpg"/> D. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/dd15eeea88842299d89794c3b00f9f90.jpg"/>