1.

In astable operation of the 555 timer, the external capacitor, C, is charged through external resistor(s) ________ and is discharged through resistor(s) ________.

A. RA, RA
B. RB, RA
C. RA and RB, RB
D. RB, RA and RB
Answer» D. RB, RA and RB


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