b

Answer

Answer outline and marking scheme for question: 2
(a) very hot matter
electrons no longer attached to nucleus [2 marks]

(b) magnetic containment
field in shape of toroid [2 marks]

(c) e.g deuterium is abundant fuel
waste products not radioactive
on system failure, stops automatically
(1 each, max 2) [2 marks]

(d) (i) E = (2.3 x 10exp-28)(2.6 x 10exp-15) = 8.8 x 10-exp14J [1 mark]

(ii) 8.8 x 10exp-14=2 x 1.5 x 1.5 x 1.38 x 10exp-23 x T
T = (8.8 x 10-14) / (2 x1.5 x 1.38 x 10exp-23
= 2.1 x 10 exp9 [2 marks]

(iii) most unlikely that hydrogen will fuse
must be some other reaction [2 marks]