Question

An inductor used in a dc power supply has an inductance of 11.5 H and a resistance of 140 Ω. It carries a current of 0.650 A.

1) What is the energy stored in the magnetic field?

Express your answer with the appropriate units.

2) At what rate is thermal energy developed in the inductor?

Express your answer with the appropriate units.

3) Does your answer to part B mean that the magnetic-field energy is decreasing with time?

Yes. Energy comes from the energy stored in the inductor.

No. Energy does not come from the energy stored in the inductor.

Yes. The rate of thermal energy development is not zero.

No. The rate of thermal energy development is zero.

Answer 1

criuen data, current, I = 0,6504 Resistance, R214012 Inductance P L=11.SH if we know that u= I LI? e, we know x11.5x10.65012 To = 2,425) that P=I²R = (0.65012(140) TP259.15 watt c) NO, The energy does not come from the energy stored in the inductor.