Afghan Farmers: Opium Is The Only Way To Make A Living. Afghan Farmers: Opium Is The Only Way To Make A Living. An Afghan farmer collects raw opium as he works in a poppy field in Nangarhar province on April 29. Poppy cultivation reached a record high this year despite Western efforts to reduce it. An Afghan farmer collects raw opium as he works in a poppy field in Nangarhar province on April 29.
Best Answer: 1. voltage on a cap, charging v = vâ[1âe^(ât/Ï)] vâ is the final voltage 2. voltage on a cap, discharging v = vâe^(ât/Ï) vâ is the initial voltage on the cap R is resistance in ohms, C is capacitance in farads t is time in seconds RC = Ï = time constant v = vâe^(ât/Ï) v/vâ = e^(âÏ/Ï) = 1/e = 0.368.
(1) and (2) are standard capacitor circuit symbols. (3) is an example of capacitors symbols in action in a voltage regulator circuit. The symbol with the curved line (#2 in the photo above) indicates that the capacitor is polarized, meaning itâs probably an electrolytic capacitor. Maximum voltage-Each capacitor is rated for a maximum voltage that can be dropped across it. 2  Some capacitors might be rated for 1.5V, others might be rated for 100V. 3  Exceeding the maximum voltage will usually result in destroying the capacitor. 4  Leakage current-Capacitors arenât perfect.