(c) Faraday
   (d) Ohm
Ans: (b)
285. The function of a ruse wire is
   (a) to stabilise the voltage
   (b) to decrease the current supply
   (c) to increase the current supply
   (d) to prevent an unduly high current from passing through a circuit
Ans: (d)
286. The method used to separate aluminium from a alumina is
   (a) electroplating
   (b) electrotyping
   (c) electrolysis
   (d) distillation
Ans: (c)
287. When an electric apparatus is fitted with a three core flexible lead the
   insulation on the three wires is distinctively coloured. The present
   international convention is
   (a) brown for earth, yellow for live, light blue for neutral
   (b) green for earth, yellow for live, brown for neutral
   (c) yellow for earth, green for live, brown for neutral
   (d) brown or red for live, light blue or black for neutral and green or yellow
       for earth
Ans: (d)
288. A tube light works on the principle of
   (a) chemical, heating and magnetic effects of electricity
   (b) discharge of electricity through gases
   (c) the action of ultraviolet radiation on certain fluorescent materials
   (d) Both (b) and (c) above
Ans: (d)
289. An ammeter has
   (a) a high resistance