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Explain current formed in solid conductors in presence of external electric field. |
Answer» Solution :`rArr` Consider cylinder of radius R as shown in figure.  ` rArr` We consider TWO thin circular DISC which have + Q and - Q charge DISTRIBUTED over them. `rArr`lf we ATTACH two disc on two fiat surface of the cylinder current will be produced which is directed from positive to negative charge. `rArr` Due to this electric field in cylinder electron will be accelerated due to this field toward + Q charge. `rArr` These electron as long as they are moving will constitute electric current. `rArr`In this condition current will be formed for very short time and will stop. `rArr`Consider mechanism like cell or battery in which whatever amount of charge + Q be neutral similar charge of - Q is obtained at other end. In this situation by battery or cell current can be obtained continuously. |
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