00:01
What is the impedance of the circuit? our impedance, z, is equal to the square root of r squared plus xl minus xc squared.
00:12
Xl is equal to omega times l.
00:16
So we plug in 100 times 170 times 10 to the negative 3 to get 17 oms.
00:24
Xc is 1 divided by omega -c, which we get as 101 -ooms.
00:30
So z is equal to the square root of 67 squared plus 17 minus 101 squared, which is 107 .4, owns.
00:42
For b, we'd like to find our max current.
00:45
Our max current is equal to emax divided by z.
00:50
Our emax is 35 divided by 107 .4, and we get 0 .325 amps.
00:58
For c, we'd like to find what is the numerical value for omega.
01:10
So we have tangent of phi equal to xc minus xl divided by r.
01:18
So from this, phi is equal to 51 .4 degrees...