A timing circuit must delay a signal by at least

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

12\,\text{ms}

, where the delay is defined as the time for a capacitor to charge to

63\%

of its final value. If a

270\,\Omega

resistor is already selected, determine the minimum capacitance, in

\mu\text{F}

, that will meet the requirement.