Q :
Who is the discoverer of hydrogen?
(A) Priestley
(B) Cavendish
(C) Ure
(D) Levizer
Engineer, During the transmission of electricity over long distances, an alternating current is passed over aluminium cables at high voltages and low current. .i) Give two reasons why is alternating current (a.c) used in preference to direct current (d.c) ?. ii) Give two reasons why are aluminium cables preferred to copper for long distance transmission of electricity?
