Doubt in Domestic Current

i have two question

1)voltage coming from our home wall socket is sine wave or sinusoidal wave.my confusion is we use vrms to get it average since average of sin wave is zero that same if there is phase shift it may become cos wave so there is chance for we can call it as sinusoidal wave isnt it?


2) For current to get through ,the ground is need.so if i touch wall socket current with slipper.does current pass through me or if i hang the power wire that going on post(space) without my leg touching ground ,does the current pass through?

Hi Bhuvanesh,

The link below explain the principle of AC and some additional notes.

1. PRINCIPLES OF ALTERNATING CURRENT

2. Household Wiring

For the 2nd question no current can pass through even if your leg touched the ground because your slipper (provided it is rubber) is an electrical insulator.

"An electrical insulator is a material whose internal electric charges do not flow freely, and therefore make it very hard to conduct an electric current under the influence of an electric field." - http://goo.gl/1RwbV7

Hope it helps