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বই থেকে নমুনা পাঠ্য (মেশিন অনুবাদিত)
(Click to expand)1. ( v ) Effects of electric current:
magnetic, heating, chemi-
cal; Electric bell.
Idea of intensity (like
flow of water per unit
ime : some thing pushed).
Idea of resistance (compare
flow of water through pipe;
pipe offers resistance to
flow).
Interaction of electricity
and magnetism. Electromagnetic induction (Faraday).
Daniel Cell, Leclanche
Cell and Lead. accu- mulators ; (No explanation of chemical reaction
required). Electricity as energy;
Motors, Heating and lighting ; Electric lamps. Electricity for communica-
tion : telegraph, telephone. C. METALS Study of the natural
occurrence and properties
and uses of the following
metals and alloys: iron,
copper, aluminium, zinc,
steel, brass, bell-metal.
(Details of methods of
extraction not required). Construction of electro-
magnet, assembling an electric
bell ; electrolysis. Simple experiments to show
action of magnet on current
and current on magnet.
Experiments ০07 electro-
magnetic induction. Handling of Daniel cell and
Leclanche cell (dry and wet)
and lead accumulator. Working models; handling
an electric iron, stove and heater; study of a fan
regulator.
Model of telegraph.
