The electricity that is delivered to our homes from regional generating stations uses high voltage
to increase the safety of transmitting electricity
to keep the available power the same despite the low current
to induce magnetic fields in the wires
to increase the magnetic field produced by the current

to keep the available power the same despite the low current".

Explanation:

From the power stations the electricity is transmitted using transformers to increase the voltage for power long distances.  At further substation, it is delivered further using smaller voltage lines.  Electricity is supplied at high voltage to increase the efficiency and minimize the lost occurring during supplying to longer distance.  

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i