[单选题]
A 6.0-V battery maint ic9 23gtm+-6wcrmusstewq 7c1gj b2 .ains the electf;x-c sv8ek9 y/l;p icqjs*a *rical potential difference between two parallel metal plates separated by 1.0 m *ckq j/x-;98e;cylvs ipf *asm. What is the electric field between the plates?