Physics question: In an RL series circuit, the maximum current
is 0.7 A. After the switch is thrown, a current
of 0.25 A is reached in 0.15 s, and then the
voltage across the resistor is 25 V. Calculate the inductance for this circuit.
Answer in units of H

Question

Physics question: In an RL series circuit, the maximum current
is 0.7 A. After the switch is thrown, a current
of 0.25 A is reached in 0.15 s, and then the
voltage across the resistor is 25 V.  Calculate the inductance for this circuit.
Answer in units of H

anonymous · Answer

I used the i=E/R91-e^(-tR/L) formula and tried with both currents and using E=70 but can't get the right answer