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Materials and Components - Engineering

Q1:

Assertion (A): In a conductor, current density remains constant in time as long as E is constant. Reason (R): In a conductor, J = σE.

A Both A and R are true and R is correct explanation of A

B Both A and R are true but R is not correct explanation of A

C A is true but R is false

D A is false but R is true

ANS:A - Both A and R are true and R is correct explanation of A

In conductors constant E means constant current because conductivity is constant.