Home › Bihar Board Class 12 (Science) › Physics › Current Electricity › How can a large current flow with a drift speed …
How can a large current flow with a drift speed of mm per second?
AElectron number density is huge
BEach electron carries extra charge
CThermal speed adds to drift speed
DThe field moves charges faster
Answer & Solution
Correct answer: A. Electron number density is huge
With roughly 10^29 free electrons per cubic metre, even slow drift carries a large amount of charge each second.
Related questions
Which mobile charge carriers conduct current in an electrolyte?The resistivity of a semiconductor can be lowered by which process?Which one of these materials is classed as an insulator on the basis of its resistivity?In the free electron model of a metal, what is the average time between successive collisiWhat is the SI unit of the mobility of charge carriers?Why is a Wheatstone bridge used with strain gauges?The electrical resistance of a strain gauge is proportional to which quantity?The ratio arms P and Q of a post office box contain which set of resistance values?