Question

QUESTION 12 The heat used to power thermal-electric generating stations is obtained from: fossil fuels such as coal, oil, or natural gas O nuclear fusion the sun both a and b QUESTION 13 The cheapest and most environmentally-safe type of generating station is: a hydroelectric generating station. O a nuclear power generating station. a coal power generating station. a natural gas power generating station.

Answer 1

(2 Answar: both a cand b are of methods of generating heat * touil tuent such a Coal, oil an Coal, oil or natural gas Nuclear furism when 4 were -- burnt it generates Steam to gener. heat the fruil fuels which the Power: will Produce the -ate

13 Aniner Hydroelectric Gearating Station ane - Nuclear Stations emit radiations into the Atmaphere and they Costly Coal e natural Enviromenta gae me paling threat to are Where as Hydro plante -Umetal friendly plante, Cheap and Enviro-

Fakte To reduce lone in the trammission line (1²2) the Voltage is stepped up by uning Step-up transformer; V, I, = V₂ qz I 2 = V /

A Amwa pĚ IR So P= IR is wrong Power Voltage * Current . =) p = VI pover's (128) v=IR P=0/0 Power F Se VI - (IR) I = IR VI = (W) () = 1 1 1 17 R Generaiting are clanified allar Stations -ding to a the method used to drive their generator" re . methods cited to drive generator are by hydrai & by wind * by Steam