The discussion focuses on calculating the electromotive force (emf) across a coil with a resistance of 3.25 ohms and an inductance of 440 mH, given a current of 3.00 A that is increasing at a rate of 3.60 A/s. The relevant formula used is emf = -L (dI/dt), where L is the inductance and dI/dt is the rate of change of current. By substituting the values into the equation, the emf can be determined, providing insights into the behavior of the coil under these conditions.
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Shackleford said:A coil has a 3.25 ohm resistance and 440 mH inductance. If the current is 3.00 A and is increasing at a rate of 3.60 A/s, what is the potential decrease across the coil at this moment?
The only equation I know to use is
emf = - L dI/dt
alphysicist said:Hi Shackleford,
What would be the emf across a 3.25 ohm resistor in this situation?