STF : Electric charge is quantized

Question

1. Electric charge is quantized. 
2. SI unit of power is joule. 
3. A.C. is more dangerous than D.C. 
4. Live wire is also called phase wire.
5. CFL lamps are cheaper than incandescent bulbs.

Answer

1. True
2. False (SI unit of power is watt)
3. True
4. True
5. False (CFL is more expensive)