One horse power is equal to :

1. 1000 W
2. 500 W
3. 764 W
4. 746 W

kWh is the unit of

1. Power
2. Force
3. Energy
4. None of these

The S.I. unit of power is

1. Watt
2. Joule
3. Nm
4. Nms

The energy of electron is 2.5 eV. When expressed in Joule, it is

1. 1.6 x 10^-19 J
2. 4.0 x 10^-19 J
3. 3.2 x 10^-19 J
4. 0