问题描述:
设电流密度为J,流经各向同性的电介质,时间t后,贮存的电荷密度是多少?
如题,今天看到一篇文献,里面提到:
When a constant current density J flows uniformly through a homogeneous dielectric for a length of time t, the total charge per unit area that has passed through the dielectric is J × t. The charge per unit area stored internally:Q=n×J×t, where n is defined as the trapping fraction.
这里我有个疑问,假如 t 是无限大,Q 也会是无限大么?显然实际中不会存在这种情况,到底该怎么理解呢?求帮助,悬赏分数不多,多多担待!
如题,今天看到一篇文献,里面提到:
When a constant current density J flows uniformly through a homogeneous dielectric for a length of time t, the total charge per unit area that has passed through the dielectric is J × t. The charge per unit area stored internally:Q=n×J×t, where n is defined as the trapping fraction.
这里我有个疑问,假如 t 是无限大,Q 也会是无限大么?显然实际中不会存在这种情况,到底该怎么理解呢?求帮助,悬赏分数不多,多多担待!
问题解答:
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