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Assertion (A): Flow of 6.25 times 10^18 electrons per second through a cross section of a conductor constitutes an electric current of one ampere. Reason ( R): Charge on an electron =1.6 times 10^-18 C

Answer»

Both (A) and (R ) are true and (R ) is correct explanation of the assertion
Both (A ) and ( R) are true but (R ) is not the correct explanation of the assertion.
(A ) is true but (R ) is false
(A) is false but (R ) is true

Solution :`I=(N E)/t implies n=(I t)/e= (1 times 1)/(1.6 times 10^-19)=6.25 times 10^18`


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