An isolated conducting sphere has a 13 cm radius. One wire carries a current of 1.0000048 A into it while another wire carries a current of 1.0000000...

An isolated conducting sphere has a 13 cm radius. One wire carries a current of 1.0000048 A into it while another wire carries a current of 1.0000000 A out of it. How long in seconds would it take for the sphere to increase in potential by 820 V?