9(b)
(i) Which particles are responsible for current in conductors ?
(ii) To which wire of a cable in a power circuit should the metal case of a geyser be connected?
(iii) To which wire should the fuse be connected?
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(i) Free electrons are responsible for flow of current in conductors.
(ii) Earth wire (green) is connected to the metal case of a geyser.
(iii) The fuse is connected to the live wire (red or brown).