primary turn : secondary turn = N1 : N2
primary coil has internal resistance r1, current i1, primary voltage E1
secondary coil has internal resistance r2 ,current i2 , step down voltage E2
E1 : E2 = N1 : N2
secondary coil is connected to a resistor R
such that V= i1 ( r1) + E1 --------(1)
E2= i2 ( r2 + R) ---------(2)
I wanna know if R is decreased , will i1 increase?
Someone told me that you can assume E2 is a constant , when R decrease, i2 will increase then power in secondary coil will increase ( power = i2 x E2)
My problem is if E2 is fixed as constant then E1 show be in constant since
they are in ratio
Then in (1) V , r1, E1 are always constant i1 can not be changed or
increase
can someone sovle it for me
更新1:
Why i2 will increase?
更新2:
Do u mean at that particular instant the E2 is constant and that's why i2 increases?
更新3:
If so, how does the magnetic flux affeacted to decreases by Lenz Law? Should it be the magnetic flux by sencondary core increase due to increase in i2 and opposite to the direction of the magnetic flux by primary core ? So magnectic flux decreases and E1 decreases