A coil is connected in series with a resistor of R.resistanceAn ideal source of electromotive force € is connected to the terminals of the set and the current reaches a value i after a time interval t. Indicate the alternative that best represents the magnetic energy UB stored in the coil. O a. EB= Ri² 2€ O b. EB: OC. EB= Od. Eg=- Oe. EB= Rt In(1+R/e) Rtª 2 ln(1-1) R² In(1-1R/e) Rt In(1-iR/e)

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A coil is connected in series with a resistor of R.resistanceAn ideal source of
electromotive force € is connected to the terminals of the set and the current reaches a
value i after a time interval t. Indicate the alternative that best represents the magnetic
energy UB stored in the coil.
Oa. EB= Ri²
2€
O b. EB:
OC. EB=
Od. EB=-
Oe. EB=
Rt.
In(1+R/e)
Rt²
2 ln(1-1)
R²
In(1-1R/e)
Rt
In(1-iR/e)
Transcribed Image Text:A coil is connected in series with a resistor of R.resistanceAn ideal source of electromotive force € is connected to the terminals of the set and the current reaches a value i after a time interval t. Indicate the alternative that best represents the magnetic energy UB stored in the coil. Oa. EB= Ri² 2€ O b. EB: OC. EB= Od. EB=- Oe. EB= Rt. In(1+R/e) Rt² 2 ln(1-1) R² In(1-1R/e) Rt In(1-iR/e)
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