In order that work may be done:(a) Two wires are necessary(b) The circuit must h

In order that work may be done:(a) Two wires are necessary(b) The circuit must have a switch(c) Coal must be burnt(d) A supply of energy is required

Question Posted / subbu

In order that work may be done:(a) Two wires are necessary(b) The circuit must have a switch(c) Coal..

A supply of energy is required

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