1.

How many electrons pass through a lamp in one minute, if the current is 300 mA ?

Answer»

SOLUTION :`I=300mA=300xx10^(-3)A`
`t="1 minute"=60s`
`E=1.6xx10^(-19)C`
`I=(q)/(t)=("ne")/(t)`
`N=(It)/(e)=(300xx10^(-3)xx60)/(1.6xx10^(-19))=1.125xx10^(20)`


Discussion

No Comment Found