- #1
hidemi
- 208
- 36
- Homework Statement
- An inductor produces a back emf in a DC series RL circuit when a switch connecting the battery to the circuit is closed. we can explain this by,
A) Lenz's law
B) increasing magnetic flux within the coils of the inductor
C) increasing current in the coils of the inductor
D) all of the above
E) only (A) and (C) above.
The answer is D.
- Relevant Equations
- Maxwell equations:
(See better interpretations at "Attempt at a Solution" section)
https://www.physicsforums.com/attachments/282071
https://www.physicsforums.com/attachments/282072
If the question changes DC to AC, the correct answer would be just A right?
The reason why (B) and (C) are wrong is that the current keeps changing direction and doesn't remain constant throughout for the coil to store energy to eventually hit the maximum. Any other better explanations?
https://www.physicsforums.com/attachments/282072
If the question changes DC to AC, the correct answer would be just A right?
The reason why (B) and (C) are wrong is that the current keeps changing direction and doesn't remain constant throughout for the coil to store energy to eventually hit the maximum. Any other better explanations?