A flash bulb in a camera is driven by a capacitor C in serie

A flash bulb in a camera is driven by a capacitor C in series with a resistance R. How long would we expect this capacitor to fully charge from an ideal constant voltage source? a. 5 C/R seconds b. R/C seconds c. R*C seconds d. 5*R*C seconds

Solution

Time constant for the RC circuit is t=RC, depends upon time constant the charging and discharging of the circuit varies.