11 Replies
@Gyro Gearloose
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.in the first E it is of FIrst case
for second case E is second
i dont understand what he meant by sigma'
ye ik it is charge density but why is he taking charge density of the whole plate when it is only asking for Electric field inside Dielectric
Once the dielectric is inserted, the potential difference remains same, but capacitance changes. Hence, more charge is pulled from the cell and the charge density on the plates changes
also why is it sigma / k epsilon not
That took me longer to understand than I would like.
E(in a dielectric) = (1/K)(field outside)
Field outside is sigma/epsilon nought
why the 1/k?
ooh wait is that from couloumbs law
1/4 pi epsilonnot k
Yes