- #1

- 70

- 3

Sorry

this is the first time i come to this forum.

Why the -Ldi/dt in the left side is minus but not plus sign

i got confused

Does everyone can help me in this problem

thank you

-------------------------------------------------------------

i know V-Ri-Ldi/dt=0 is true in the right hand side

however,it doesnt make sense that the "-L di/dt" term is still the same

when the di/dt is decreasing rather than increasing in the left hand side.

V=0

the direction of the induced emf is reverseing(so it should be Ldi/dt but not- Ldi/dt?)

the Ri is still the same when the i is in the same direction as before.

i think it should be L*di/dt-Ri=0

what's wrong with that?

this is the first time i come to this forum.

Why the -Ldi/dt in the left side is minus but not plus sign

i got confused

Does everyone can help me in this problem

thank you

-------------------------------------------------------------

i know V-Ri-Ldi/dt=0 is true in the right hand side

however,it doesnt make sense that the "-L di/dt" term is still the same

when the di/dt is decreasing rather than increasing in the left hand side.

V=0

the direction of the induced emf is reverseing(so it should be Ldi/dt but not- Ldi/dt?)

the Ri is still the same when the i is in the same direction as before.

i think it should be L*di/dt-Ri=0

what's wrong with that?