正弦交流电流i=10√2sin(100πt+30°)A,则电流有效值为(____)。
A10$;$14.14A$;$7.07A$;$10A
B10$;$14.14A$;$7.07A$;$10A
C10$;$14.14A$;$7.07A$;$10A
D10$;$14.14A$;$7.07A$;$10A
A10$;$14.14A$;$7.07A$;$10A
B10$;$14.14A$;$7.07A$;$10A
C10$;$14.14A$;$7.07A$;$10A
D10$;$14.14A$;$7.07A$;$10A