Answer:
induced EMF = 240 V
and by the lenz's law direction of induced EMF is opposite to the applied EMF
Explanation:
given data
inductance = 8 mH
resistance = 5 Ω
current = 4.0 A
time t = 0
current grow = 4.0 A to 10.0 A
to find out
value and the direction of the induced EMF
solution
we get here induced EMF of induction is express as
E = - L [tex]\frac{dI}{dt}[/tex] ...................1
so E = - L [tex]\frac{I2 - I1}{dt}[/tex]
put here value we get
E = - 8 × [tex]10^{-3}[/tex] [tex]\frac{10 - 4}{0.2*10^{-3}}[/tex]
E = -40 × 6
E = -240
take magnitude
induced EMF = 240 V
and by the lenz's law we get direction of induced EMF is opposite to the applied EMF
