Capacitor Questions?

Question

I bought 4 1000MFD 25Volt electrolytic capacitors

1-When it says "25volts" does it mean AP or DC?

2-What does "MFD" mean?

3-Which wire of the capacitor is positive and which is negative?

4-How long would this take to charge?

Answer 1

1. Its DC

2. MicroFarad (unit for capacitance)

3. The nearest wire to the minus(-) symbol printed vertically in

     the body of the capacitor is the negative end w/c means

     the other wire is the positive.

4. Depending on the capacitance, and the supply. It can charge in milliseconds and can be discharge by shorting both terminals.