A power in nature, a manifestation of energy, exhibiting itself when in disturbed equilibrium or in activity by a circuit movement, the fact of direction in which involves polarity, or opposition of properties in opposite directions; also, by attraction for many substances, by a law involving attraction between surfaces of unlike polarity, and repulsion between those of like; by exhibiting accumulated polar tension when the circuit is broken; and by producing heat, light, concussion, and often chemical changes when the circuit passes between the poles or through any imperfectly conducting substance or space. It is generally brought into action by any disturbance of molecular equilibrium, whether from a chemical, physical, or mechanical, cause.

Making a Lamp Tester

Procedures:

Here's How:
1. Unplug your PC, monitor or other device from the wall outlet and plug in a small lamp or other device that you know is working fine.
If the lamp comes on then you know your power from the wall is good.
2. If you're using a power strip, follow the same directions as in the last step for your power strip.
3. Also, unplug your computer case, monitor and any other device from the outlets on the power strip and perform the same "lamp test" on the power strip outlets to see if they are functioning properly.
Make sure that the power switch on the power strip is flipped on!
4. If any of the wall outlets are not providing power, troubleshoot this issue or call an electrician.