00:01
Hi students, in this question we have four parts of question.
00:04
So first part, a part we have to find out the magnetic flux density in the core.
00:09
So what is the equation for magnetic flux density in the core? so magnetic flux density.
00:21
So magnetic flux density can be find out using this equation b is equal to v1 into 10 raise to 8 divided by 4 .44 into f n1 into a, where v1 is the voltage in the primary coil, voltage in primary.
00:47
The values for each term like v1, voltage is given as 250 volt, number of turns n1 is given as 200.
01:02
Then calculate the magnetic flux density b is equal to 250 into 10 raise to 8 divided by 4 .44 into 60 into n1, n1 is 200, 200 into a that is 40 into 10 raise to minus 2.
01:27
So that's equal to 1 .173 into 10 raise to 6 tesla.
01:40
Therefore, magnetic flux density, flux density is 1 .173 into 10 raise to 6 tesla.
01:59
So now we have to find out the voltage rate at the secondary, voltage rate at secondary.
02:13
Now we have the equation for secondary voltage, secondary voltage can be denoted as v2.
02:20
So v2 is equal to n2 by n1 into v1.
02:27
So what is v2 is equal to 500 divided by 200 into 250, 250 is the primary voltage.
02:41
So this will equal to 625 volt.
02:45
So the secondary voltage is or voltage rate at secondary, voltage rate at secondary is 625 volt...