(a) A – cathode B – Anode C – Cooling fins
(b) (i) increase the p.d at the anode (B)
(ii) : increase the cathode heater current
(c) Tungsten:- It has a high melting point so the heat produced will not melt it easily
(d) Copper – it is used to cool/conduct heat away from the anode
(e) So that the electrons do not collide with gas molecules which could result in loss of energy.
sharon kalunda answered the question on April 5, 2019 at 13:45
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